Running
These are some AWESOME sites on running:
http://www.flashgame6.com/157-1-1/running-games
http://www.google.com/images?q=running+coloring+pages&oe=ut
Running is a great sport. But you don't have to run on a team to run. Running can just be for fun. There are many ways to run. You can run cross-country (long distance), you can run track (short distance), and you can run for fun.
Running is another sport that you don't need any padding for. Though, you can twist your ankle, running is a pretty safe sport.