Features: Made of quality material, no odor and no harm to the health. DIY modeling objects, easy to assemble, battery powered, great projects for parent-child interaction. Providing scientific education,accumulate scientific knowledge. Simulate tank principle, enrich children's science lesson and improve their observation capability, thinking and analytical skills. Suitable for children above 14 years old. Specification: Condition: 100% Brand New Item Type: Science Experiment Toy Set Color: As Pictures Show Material: Plastic Battery Type: 2 * AA Battery(Not Included) Size: Approx.10 * 15 * 2cm / 3.9 * 5.9 * 0.8in Weight: Approx.111g Package List: 1 * DIY Toy Set Package List 1Suitable for children above 14 years old. 2Simulate tank principle, enrich children's science lesson and improve their observation capability, thinking and analytical skills. 3Providing scientific education,accumulate scientific knowledge. 4DIY modeling objects, easy to assemble, battery powered, great projects for parent-child interaction. 5Made of quality material, no odor and no harm to the health.