Cat toys

Boulder

A felt ball with a bell ball inside and cat-shaped holes in the panels: light enough to bat across a room and carry off.

5.0 out of 5.0, 8 reviews
Grey Boulder

$41.00 AUD

Fits a hand; about 95 g. Light enough for her to bat across the room, pick up and kick, so one per cat is the right number. It turns up in other rooms.

Color Grey

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  • Faulty or wrong item? Covered within 7 days

Vet designed

Designed by emergency vet Dr Duncan Houston. Tested at home by Gary, a Ragdoll who carries it to bed and loses it under the fridge.

Why this toy

  • Designed by Dr Duncan Houston
  • Tested by Gary
  • Bell ball inside, holes all round
  • One felt piece, laces up

Explainer

Dr Duncan explains the Boulder

Back to colours
Filmed by Dr Duncan Houston, emergency veterinarian and founder of PURRZ™. No script department, no actors, the product in his hands.
Read the script
  1. 0:00 Good day. I'm Dr Duncan Houston and this is my fake living room.
  2. 0:03 Then we've got the Boulder Ball. This one is similar to the dice ball, but it's the shape of a ball. This one has a logo on the bottom.
  3. 0:12 You put this together with a bit of string at the top. Just make sure with the string that all the knot and metal bits go inside, not on the outside. That just keeps the structural integrity.
  4. 0:23 Inside, you have a blue ball with a bell in it for the cat to knock around.
  5. 0:27 This one's quite good; it rolls around and is very lightweight, so your cat can play with that and knock it around, and it still makes a jingle noise. Yeah, really good toy.

In this video

How it works

Why the Boulder works for a cat left alone all day

Illustrated cat pouncing between two Boulders on the floor, one in Grey and one in Cream, a paw on the Cream one

A ball first, a puzzle second

Most bell-ball toys are a box with a ball in it.

  • Bats it across the roomThis one is the ball. At about 95 grams she bats it across the room, chases it, picks it up and kicks it, the bell ringing the whole way.
  • Fishes through the holesWhen it stops she fishes at the ball through the holes until it moves again.
  • Runs without youA chase, a catch and a kill, and it runs without you.
Illustrated cat crouched with a paw through the cat-shaped cut-out of the Cream Boulder, the bell ball just inside

Holes for a paw, not the ball

Each felt panel carries a cat-shaped cut-out or a slot: big enough for a paw and a claw, smaller than the bell ball inside, so the ball stays in and the game stays interesting.

  • Rolls a metre and stopsThe faceted shape is why it rolls a metre and stops instead of running under the fridge every time, and why it sits still long enough for her to work at it.
Illustrated man kneeling with the laced Cream Boulder in his hands, the Grey one unlaced and lying flat as six petals beside the bell ball and the cord, a cat watching

One felt piece, laced up

It arrives as one flat piece of polyester felt cut into six petals, with the bell ball loose beside it.

  • Fold the petals, lace the cordFold the petals up around the ball and lace the cord through the eyelets at the top, no tools.
  • Unlace it for the lint rollerUnlace it and it lies flat for the lint roller or the vacuum, then laces back up.
  • Grey or CreamGrey or Cream, and it packs to 20 by 20 by 8 cm.

Size guide

One size, two colours: will it suit my cat, and what is in the box

  • Selected
    Grey Boulder17 x 17 x 17 cm

    One size

    About 95 gFits a hand

    17 x 17 x 17 cm

Three rules for choosing

  • One per cat is the right number, because it goes wherever she takes it. Two cats can share one and mostly will not; two cats with one each will still swap.

  • Kittens: from the point she is pouncing on things, with the lacing checked, because a kitten chews cord. Adult cats carry it; a kitten bats it.

  • Big cats and back-leg kickers are who it is for: a Ragdoll or a Maine Coon can hold it against her chest and kick, which a small ball does not allow. A cat who prefers to work a toy in one spot wants the Puzzle Pal instead.

Illustrated cat sitting behind two Boulders on the floor, one in Grey and one in Cream

Specifications

Assembled size
17 x 17 x 17 cm
Flat pack
20 x 20 x 8 cm
Weight
About 95 g
Material
Polyester felt, with a logo on the bottom; cord lacing through eyelets; hollow plastic bell ball
Openings
A cat-shaped cut-out or a slot in each panel
Ball
One hollow plastic ball with a bell inside, blue; loose in the flat pack, closed in when the petals are laced. Smaller than the ball, larger than the cut-outs
Assembly
One felt piece cut as six petals folds up around the ball and laces at the top, the knot and the cord's metal ends pushed inside the ball, no tools
Colours
Grey (charcoal felt), Cream (pale oat felt)
Care
Unlace it and lay it flat: brush or vacuum fur off, wipe with a damp cloth
In the box
One felt piece, the lacing cord, 1 bell ball
Designed by
Dr Duncan Houston, emergency veterinarian, PURRZ™
Made in
China

How to

How to set it up so she actually plays with it

  • Illustrated man sitting cross-legged on the floor pulling the cord tight at the top of the Grey Boulder, a cat sitting beside him

    Lace it up

    Ball in the middle of the flat piece, petals up around it, cord through the eyelets at the top and knotted. Push the knot and the cord's metal ends inside the ball, not outside. Two minutes, no tools.

  • Illustrated man crouching and pushing the Grey Boulder across the floor towards a crouched cat

    Roll it once in front of her

    One push so it rings and rolls, then leave her to it. Most cats have chased it within the minute.

  • Illustrated cat walking off with the Cream Boulder held in her mouth

    Let her take it

    It will end up under the couch, in her bed, in another room. That is the toy working. Fish it out when she has forgotten it.

  • Illustrated man kneeling with the Cream Boulder in one hand and his fingers at the knot on top, a cat sitting beside him

    Check the lacing

    A glance at the knot every few days. A chewed cord gets re-tied or replaced; a cat who chews cord loses the toy.

  • Illustrated man putting the Cream Boulder into the open drawer of a white chest, a cat sitting beside it

    Rotate it

    A week out, a fortnight in a drawer, back out again. Novelty is most of what a solo toy sells, so keep some in reserve.

Vet noteDr Duncan Houston, emergency veterinarian

A leave-out toy with one part to watch, the lacing. The cord is what holds it together, and cord is the thing cats swallow: a cat who chews at the knot rather than the felt should have the toy taken away, because swallowed string is how a cat ends up in surgery. Check the knot every few days and after every clean. The ball is hollow plastic with a bell inside; if it cracks, the bell and the shards are small enough to swallow, so a cracked ball goes in the bin and a replacement goes in the felt. A cat who eats the felt itself should lose the toy; some cats eat fabric, and felt in the gut is an obstruction. A cat who suddenly stops eating, vomits repeatedly or strains in the tray needs a vet the same day, not a new toy.

Dr Duncan Houston outdoors holding Gary, his Ragdoll
Dr Duncan Houston Emergency veterinarian and founder of PURRZ™

Why I designed it

The bell ball she can pick up and take with her.

Three of my leave-out toys have a bell ball inside a felt shell.

  • The Puzzle Pal sits stillThe Puzzle Pal sits still and makes her work.
  • The dice tumblesThe dice tumbles when she hits it.
  • The one she can pick upThe Boulder is the one she can pick up. At about 95 grams it is a ball first: she bats it across the room, chases it, grabs it, kicks it, and the bell inside goes the whole time.
  • Cat-shaped holes in the panelsThe cat-shaped holes in the panels are where the paw goes in after the ball, and they are why she cannot simply get the bell out and lose interest.
  • One felt pieceOne felt piece that laces up.
  • Tested by GaryGary carries his to bed.

Compare the range

Boulder vs the other PURRZ™ toys

See all cat toys
Boulder vs the other PURRZ™ toys
This productBoulderHigh Roller DicePuzzle PalTeddy Multi-Use Laser ToyBird Feather Wand Set
Best forSolo play she can carry off: the ball to bat, kick and chaseSolo play that moves across the floorSolo play in one spot; a food puzzle with dry biscuitsThe chase with a catch at the end; night-time playHands-on feather play with refills in the box
How the cat playsBats and kicks a felt ball with a bell ball inside; fishes at it through cat-shaped holesPaws a bell ball through pip holes; the cube tumblesReaches through lid holes for a bell ball, swipes feathers on springsChases the dot, catches the featherStalks and pounces on feathers
You or the cat aloneCat aloneCat aloneCat aloneYouYou
WeightAbout 95 gAbout 170 gAbout 300 gAbout 150 g
FeathersNoneNone2 on springs1 attachment6 attachments, 3 styles
OptionsGrey, CreamGrey, CreamGrey, CreamBlack, BlueCockatoo Chaos, Kookaburra Craze
Price from$41.00 AUD$41.00 AUD$57.00 AUD$28.00 AUD$41.00 AUD
Reviews Rated 5.0 out of 5.0 from 8 reviews Rated 5.0 out of 5.0 from 9 reviews Rated 5.0 out of 5.0 from 8 reviews Rated 4.8 out of 5.0 from 10 reviews Rated 5.0 out of 5.0 from 9 reviews
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Reviews

Boulder reviews

Rated 5.0 from 8 reviews on Judge.me.

Rated 5.0 out of 5.

Based on 8 Judge.me reviews

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    • The textured surface provides excellent paw grip during batting sessions. This toy has become my cat's preferred solo entertainment.

      HaroldJune 2026
    • The internal bell combined with the boulder shape creates irresistible batting appeal. My cat's play sessions have lengthened dramatically.

      Fred GrayJune 2026

    FAQ

    Boulder questions, answered by a vet

    Shipping and returns

    Dispatch
    Tracking sent when it ships; dispatch and delivery times by country are on the shipping page.
    Delivery
    Tracked, worldwide. International orders may attract duties.
    Returns
    Faulty, damaged or incorrect items are covered within 7 days of delivery. Email hello@purrz.com to start.
    What does a cat actually do with it?

    Bats it, chases it, picks it up and kicks it, and the bell ball inside rings the whole way. When it stops she puts a paw through one of the cut-outs after the ball and sets it going again. It is built for a cat on her own, and because it weighs about 95 grams it goes where she takes it, which is usually under something.

    Is it safe to leave out while I am at work?

    Yes, with one thing to check: the lacing. The cord at the top holds it together, and cord is what cats swallow, so look at the knot every few days and take the toy away from a cat who chews at it rather than the felt. A cracked ball goes in the bin, because the bell inside is small enough to swallow. No feathers, no string hanging loose.

    Grey or Cream?

    Same ball, same bell. Grey is charcoal felt and shows light fur less; Cream is a pale oat felt and shows dark fur less. Both are in stock and ship now. Pick the one that matches the floor it will live on, or buy one of each for a two-cat house, because they will swap anyway.

    Does the ball come out?

    No. The bell ball goes in when you lace the petals up and it is bigger than every cut-out, so it stays in unless the lacing comes undone. The cut-outs are for a paw and a claw. If the ball ever does come out, the lacing has loosened: re-tie it, and check the cord for chewing.

    Can my kitten use it?

    From the point she is pouncing on things. It is light enough for a kitten to move and the cut-outs take a small paw. The one rule is the lacing: kittens chew cord, so check the knot daily in the first months and take the toy away from a kitten who works at it. She will carry it about; that is the toy doing its job.

    How do I clean it, and will it last?

    Unlace the cord and the whole thing lies flat as one felt piece: brush or vacuum the fur off, wipe it with a damp cloth, lace it back up. Assume it does not survive a washing machine. Felt takes a lot of batting; a cat who is shredding it rather than playing wants a scratcher, and the felt will tell you which cat you have.

    What if it arrives damaged or my cat ignores it?

    Email hello@purrz.com within 7 days of delivery with a photo and your order number; faulty, damaged or incorrect items are covered and we pay the return shipping when the error is ours. A cat who ignores it in week one usually wants it to move first: one push so it rings and rolls, on a hard floor, and give it a fortnight.

    Part of the Ask A Vet ecosystem

    Bored, restless or chewing things she should not? Ask a vet.

    PURRZ™ is the cat product arm of Ask A Vet, Dr Duncan Houston's animal health platform. Track your cat's weight, food and symptoms, set worming and flea reminders, and chat with a certified vet when something is not right.

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    Ask A Vet app home screen
    Boulder Grey
    $41.00 AUD