Rubber Band Toy Tractor

This is the 3D-printed version of a toy we used to make as kids from sewing thread spools, matches, rubber band (cut from bicycle tube) and flat washers made of soap or wax (candle stumps). A really nice thing to make with your kids or simply get on a trip down memory lane :)

INSTRUCTIONS:
Insert the rubber band into the spool hole and fix it with the clip when it comes out on the other end to inhibit the rotation. Put the loose end of the rubber band through the wax/soap washer and insert t