Build authentic moving models with the Erector 20 Model Case! This unique construction set includes 260 building pieces and all the tools that your child needs to screw the parts together like a real mechanic. You can hammer together parts, attach wheels, and fit screws into their matching holes with the included screwdriver. This multi-model building set comes with 3V motor to power your models to move. Some of the machines that your young mechanic can build in this kit are a helicopter with a rotating propeller and see-through cabin, a pick-up crane that actually works, different types of racecars and more! The Erector 20 Model Case from Educational Toys Planet comes in a storage bin and includes a full color, easy-to-understand instruction manual.