There are 6 different types of simple machines in total, that are the building blocks of all other inventions out there. Those simple machines are:
1. The wheel and axle
2. The lever
3. The inclined plane
4. The screw
5. The Wedge
6. The Pulley
An example of one of these machines found inside a pinball machine would be a lever, used to flick the ball around inside.
