Aren't Peewee 50s great!
Looks like a good time was had by all.
Look around, usually you can pick up used ones for $500, give or take a few $$. Get them some dirt gear (helmet, goggles, knee & elbow pads, and boots) and go to a MX track. Most all tracks have a kids track off to the side for the PW50 crowd. Fun, exercise, and family time all rolled into one.