1) MyKid DIY STEM Science Experience Kits Electronic 3D Wooden Puzzle /or -> suitable for 7 yrs old above. 2) MyKid DIY STEM Electronic 3D Wooden Puzzle with Remote Control -> suitable for 12 yrs old above. This package includes: •Un-assembly Kit Set 3D Puzzle, •Includes all tools: Wooden piece/puzzle, Electronic motor, Glue, and all parts, •Direct assembly, some additional parts might unnecessary, •It is simple to assemble and improves children's productivity, •English assemble instruction. Electronic Engineering Model Kits, a great product for student projects: •Simple and practical promotes interaction between family and friends, intellectual development. •Made of natural wood, eco-friendly, non-toxic, smooth without any burrs, and durable for long-lasting use. •As a puzzle science education kit, it trains the minds of young children, and by completing it, they are granted a sense of self-accomplishment for making a toy for themselves. Note: All model is running on the ground! Need to be equipped with self prepare 2x AA batteries. *For remote control type: additional 2xAA batteries for the controller to be needed.