??12 Models in Total: 573 PCS of STEM Toys could be built into a big flexible robot 12 city engineering vehicles. 12 models in total can maximize the hands-on ability of your child. Children always have endless creativity!??Learn while Playing:Educational Building Sets could rapidly improve kids hand-eye coordination & manipulative ability and train their logical thinking & problem solving-ability during the building time??STEM SUPPORTED: Integrating boring Technological and Engineering knowledge and concepts into funny games, our Transformer Toy is designed for 6+ years old children exclusively to improve their Science, Technology, Engineering, and Math skills at their most creative age??SAFE AND SUPERIOR QUALITY MATERIALS:The STEM building sets are made of high security material . No smell, smooth without burrs, colorful and solid, good quality kids gift for 6 7 8 9 10+ years old boys and girls??Compatible with All Major Brands: Designed to universal standards, Robot Building Toys are compatible with your existing name brand building bricks. You can design your own models by adding more toys in