Things You'll Need
Instructions
Use two paper plates to make your circle. Have the paper plates face each other so that the rims touch.
Staple the rims together with a staple gun. Since you aren't putting anything in the middle of the plates, you only need a few staples.
Paint the paper plate red on both sides. This is the main color of Mars.
Add brown spots to your planet. The best way to do this is to get a picture of Mars to refer to. You can get one for the library or you can look up some pictures online.
Give the paint some time to dry.