All games are "programs" - a set of software instructions that tell your computer what to do. If you want to make your own games, you need to learn some programming!

Here are some things you can use to learn programming:

Greenfoot - a programming tool to help students learn Java.
http://www.greenfoot.org/index.html

Mindstorms - program lego robots!
http://mindstorms.lego.com/eng/Overview/default.aspx