Smithsonian Motor-Works Kit

Build a working model of a 4-cylinder engine. Valves rock, spark plugs fire and Pistons drive the crankshaft. Screws together and is easy to build. Includes over 100 parts that screw together easily, and detailed instructions. Includes color poster (35" x 23"). Uses 2 "AA" batteries (not included). For ages 8 years and up. Item:# 66399

Price: $49.99

Quantity

Smithsonian Motor-Works Kit 1 5 1 1

defective design This was bought as a Christmas gift for my 12 year old grandson. According to my son in law the cylinders that the pistons are supposed to fit into are oval shaped, not round like the pistons, Therefore, it will not go together. Still waiting for return label so I can return it. January 7, 2012

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