How do they get animals to do these things?

the most crazy and at the same time creative Rube Goldberg Device I have ever seen!

Here’s some Body Facts you probably haven’t heard of yet.. More than half the bones in your body are located in your hands and feet. There is enough iron in the human body to make one small nail. Women blink almost twice as much as men. A sneeze can exceed the speed of 100 mph. [...]