The stacking car has 3 dowels that can be used to slot wooden blocks of different shapes. It can also be used to display, hold, and store Smart Finger Puppets. It is crafted from local sustainably harvested native maple hardwood and is compatible with our and other wooden railway systems. Measures approximately 3-1/8" by 1-7/8" high. Strong magnets allow you to attach to your name or make a special train. People colors may vary from those shown. Non-toxic finish.