• 50 litres of water
• 50 kilograms of corn starch

At Znanstival dogodivščin, a festival of science adventures that took place in previous years, we prepared a pool filled with a strange liquid. If you put an object on it, it sank. If, however, you quickly tapped the surface, the liquid seemed solid and the hand did not sink into it.

We were all able to run across the liquid but sank into it if we stopped in the middle of the pool. And why stop at running when we can also cycle: