NATIONAL GEOGRAPHIC Ultimate Construction Engineering Set - Build 100 Unique Motorized Models: Helicopters, Cars, Animals and More - STEM Learning [amazon.com]
BUILD AMAZING MOTORIZED MODELS with 219 pieces that snap to form racecars, dinosaurs, trucks, bulldozers, motorcycles and more. Use our detailed instruction guide or let your imagination lead the way
INCREDIBLE INTERACTIVE APP lets you use your smart phone to find even more building options with 3D exploded views and piece-by-piece instructions. Free download available for Android and Apple iOS
MAKE YOUR MODELS MOVE with the attachable battery-powered motor to give life to your creations, in forward or reverse!
SIMPLE SNAP-FIT PIECES make construction incredibly quick and the included extractor tool means easy disassembly so you can reuse the pieces again and again
100% SATISFACTION GUARANTEED - For 129 years, National Geographic has been a brand you can trust for scientific and educational excellence