With this B Submarine Build-a-ma-jigs you can create things found way down in the Ocean, or deep in your imagination. Take the Submarine apart then put it together again & again as many times as you like. Toy power drill with forward & reverse motion is included with 3 interchangeable bits to help you build & it's complete with batteries. Propeller spins, the dorsal fin lifts up. The 16 pieces are interchangeable with other Build-a-ma-jigs sets too. Look out for the B Build-a-ma-jigs Dump Truck, Roadster & Aeroplane (sold separately).