Stem Science Experiment Kit For Kids Electronic Physics Circuit Building Blocks Diy Assembly Educational Learning Toy Boys Gift gray.Is Electric : No battery Block Size : Small building block(Compatible with Lego) Barcode : Yes Gender : Unisex Plastic Type : ABS Model Number : 110 Warning : Do not consume Material : Plastic Recommend Age : 3-6Y,18+,14+y,6-12Y Origin : Mainland China Plastic Block Shape : Self-Locking Bricks Plastic Type : ABS Whether to send with paper box : No/Yes Toys type : B