Re: fun physics/engineering game
idaho...i made a track vehicle of sorts, but used the yellow balls with just a stick connecting them, (not acutal tracks, just looks like a damn tank) with the pink ball in the front as a "scoop" triangulated in place, with a stick as a wedge to help all the balls go over my vehicle.
edit
three tiers high, and i used the entire length of the work area to make my "horsepower".
Clear as mud?