Chain Reaction

Do you know a chain reaction is? It is a reaction like the one in the first video. I saw it in the NEMO center in Amsterdam. The chain reaction, in the end, launched the rocket. If it has a useful purpose, than it is called a Rube Goldberg Machine. It got that name from a cartoonist who drew complicated contraptions that performed simple tasks. In the UK they call a Heath Robinson machine, because another cartoonist named Heath Roninson drew wacky machines too. The second video shows my favorite Rube Goldberg machine: