An airplane is a complex machine. Watch this video to see all the airplanes which enter the area of Britain in one day.
Here are some videos about several kinds of simple machine:
This video shows you how to build a home made catapult out of materials you can find around the house. Have fun!
Go to these links to play some games about Simple Machines!
Click here to learn about some examples of simple machines!
Here's a video you can watch about Simple Machines: