Electrical discharge
Popping of a kernel
Water crystallizing into snow
Lithium on fire
A Neodymium Magnet falling through a copper pipe
Liquid Nitrogen mixed with 1500 ping pong balls
Dip a spoon of Gallium into a glass of hot water
Make a bubble with smoke instead of air
Slicing a bead of Mercury in half
Push two identical clouds of smoke
Ball caught in underwater toroidal vortex
Set fire to smoke
Crystallization of Supersaturated Sodium Acetate
Interesting science game
Physics trick