Make just four different front and rear halves and several tops and let the kids combine them in different ways to make dozens of different cars. Parts fit together on 3/8" dowel pins. Easy to build from 3/4" and 1-1/2" stock. Cars measure 10"L. All patterns drawn FULL SIZE. Order one package of 20 each #W203 Wheels, two packages of 20 each #AP4 Axle Pegs and one package of 20 each #1382 Dowel Pins.