Aisle 6No. 96 of 460
Splashery
Menger Sponge
709,989 small parts. Assembled in your browser.
Empty. Now look down.

Swipe across the pack to tear it open.
Press and hold. It pulls itself together.
Let go to drop it.
It stays in its pack here. The Playground has the rest.
Math · Built from a recipe
Menger Sponge
A Menger sponge is a fractal.
Play with it in the Playground
How to play
Tap to close and carve the holes. Hands-on: pull the small cubes out one by one.
Toy facts
- Item
- No. 96 of 460
- Shelf
- Aisle 6, Math
- Kind
- Built from a recipe
- Small parts
- 709,989
- Sound
- Yes
- Hands-on
- Yes
- Batteries
- None
- Assembly
- It does that itself
- Licenses
- Own work (made in the page)
- Price
- $0.00
Small parts are the splats in its usual build on a computer. A phone may draw fewer.
Its controls
| Control | Kind | Range | Start |
|---|---|---|---|
| Close and carve the holes | Tap | ||
| Carve | Button | ||
| Level | List | 2 choices | Level 3 |
About it
A Menger sponge is a fractal. Start with a cube and cut it into 27 smaller cubes, like a puzzle cube. Take out the one in the middle and the six at the middle of each face, leaving 20. Then do the same to each of those 20 cubes, and again, forever. Karl Menger described it in 1926.
Tap it and every hole is plugged, the smallest first, until it is a plain cube. Then it is carved again: the big cubes slide out of the faces, then the next size down, then the smallest. Pick level 2 or 3 in the Splash tab: level 2 keeps 400 little cubes, and level 3 keeps 8,000.
Details
- Splats
- Opens at 200,000 at Mid Detail, 59,998 at Low, and up to 999,983 at Max
Sources and credits
Made in Splashery. Its code is MIT.



