Feature: 1. Engine model's bottom plate is made of brushed stainless steel, which is exquisite and beautiful. 2. And such toy's frame is processed by CNC, which shows that the sandblasting treatment is firm. 3. Meanwhile, the engine model can be widely used for children's science projects, physics / mechanical learning, and teacher demonstration props in the classroom. 4. Entitled with pratical adoptability, such a physical toy's high playability can keep its attraction for a long time. 5. For children, this toy can develop experiment realization and interest cultivation, promoting other ability development. Specification: Item Type: Engine modelMaterial: Stainless steel. Package List: 1 x Engine1 x Light Bulb (Random Color)1 x Bottle1 x Rubber Band (Random Color)1 x Qartz Tube1 x Small Light3 x Small Rubber Ring1 x Foam