[Niklas] told us about his newest art project that he is calling a Pneumatic Sponge Ball Accelerator. This isn’t a home workshop type of project, it is a full fledged art exhibit displayed at ...

One-thousand black sponge balls move from a big glass ball-reservoir bubble to another via a 150 meter long track of clear plastic tubing. The balls move up to an impressive 4 meters a second.

3. Make Water Balls If you’ve spent any time on Pinterest lately, you’ll recognize these colourful sponge balls. In addition to being oh-so easy to make, sponge balls are also quite versatile.