This is so neat!

It's a fun game for kids or big kids alike, and it's from the Jet Propulsion Laboratory in California, home of my friend Tracy. In fact, the first one I built had a Tracy look-alike. But here's mine:

You can send your orbiter or rover to the Moon, Mars (polar), Mars (equator), or the moon Titan. Have fun with different instruments, hairstyles, you name it. And of course I made my rover purple. :)

Try it yourself at: http://jpl.nasa.gov/education/BuildMissionGame.cfm