A game where you make a robot?

When I was younger, I used to play a game where you could make a 3D model of your robot, then test there strength by attempting to push blocks or by pitting them against eachother. I THINK, but im not sure, that you could test its speed on a track too.. No, it wasn't Robot Wars. I was randomly thinking about mychildhood today and my kids would love to play it! Please, if you can help, do.