It's already assembled. Everything in the photos is included. For those who understand that this is a home-stored item. From Amazon: This is a solar-powered mechanical construction kit. It can be reconfigured, and kids can enjoy 4 different designs. 1. Solar Dinosaur: A design like a T-REX. It walks forward on two legs. 2. Jet Drill: It runs while rotating the drill in front. 3. Solar Hercules: It walks while moving its horns up and down. 4. Solar Robo T4: A robot that walks forward on two legs. Tools needed for construction: nippers, hammer. ♯EK Japan ♯Summer Project ♯Elementary School Student ♯Spring Break ♯Summer Break ♯Solar Battery ♯Toy ♯ELEKIT