Oh, I kind of wish I hadn't looked. That's the one I'm on now!

Still, great design! laugh

My DS loves this site, too. He said, "It's fun, AND it's science! Cool!"

grin

I'm thinking of working it into our homeschool curriculum by assigning him certain parameters to the ones he's already solved in other ways--like "You must use a ramp for this one" or something like that.

Kriston