The little car sits in a very stable track at the top of the platform, and runs way beyond where the tracks end so plan on it.  Parents were startled at how quickly their 3 year old took to this toy - no learning at all.  One ride down the ramp, and that car was on it's way back up.  Just for safety sake, I'd have them wear a helmet, but you'd have to get pretty silly to fall off of this thing.  I haven't heard laughs like that out of that child before - GREAT hit.