Become an engineer, builder or mechanic working on your models with the Erector 25 Model Set. This kids multi-model construction set includes more than 260 pieces, modeling tools, and detailed assembly instructions for 8 models and 17 construction ideas. This Erector building set features fun construction parts such as 3V motor, rotators, and cabins to build complex new models. Your young constructor can build drag-racing monster truck, a detailed motorcycle, a helicopter with a spinning propeller, a moving wind mill, a moon lander, a jetski, and more! The only construction part not included in the Erector 25 Model Case from Educational Toys Planet is your child's imagination and creativity. Just add them on to all these amazing metal construction pieces and have building fun for hours! The motor requires 2 AA batteries (not included).