Kidder Junior Engineering Box - Pulleys & Gears This assortment of pulleys and gears come in a handy divided utility case. Items included are assorted sizes of pulleys, motor pulleys, assorted gears, worm gears, gear racks, and dowels. There are...

Kidder Junior Engineering Box - Wheels This assortment of wheels come in a handy divided utility case. Items included are MDF wheels, plastic dragster wheels, card disk wheels, super wheels, and dowel to be used as axles. There are 401...