Features: 1. material: Made of material, nontoxic , safe, Eco-friendly and durable to play. 2. Rounded edge: Exquisite workmanship without burrs, it won't hurt kids hands. 3. Multiple circuit groups: With the colorful projector lamp, it can DIY all kinds of electronic circuit building blocks, which could cultivate children's imagination and help them learn physics knowledge. 4. Bright color and stylish design: Colorful appearance can attract kid's attention, and improve their hand-on ability, thinking capacity, which is good for developing kid's intelligence and interactive ability. 5. Wonderful gift for your kids or friends. They gonna love it! Specification: Condition: Material: Plastic Battery: 3 x AA Battery (Not Included) Package Size: Approx. 19 x 14 x 5cm / 7.48 x 5.51 x 1.97in Package List: 1 Set of DIY Toy 1,1. material: Made of material, nontoxic , safe, Eco-friendly and durable to play. 2,2. Rounded edge: Exquisite workmanship without burrs, it won't hurt kids hands. 3,3. Multiple circuit groups: With the colorful projector lamp, it can DIY all kinds of electronic circuit building blocks, which could cultivate children's imagination and help them learn physics knowledge. 4,4. Bright color and stylish design: Colorful appearance can attract kid's attention, and improve their hand-on ability, thinking capacity, which is good for developing kid's intelligence and interactive ability. 5,5. Wonderful gift for your kids or friends. They gonna love it!