25 IN 1 Transformers : The transformers made of 566 pieces building in the box and offer 25 different building suggestions. Kids can build 12 mini construction warcrafts of different shapes at the same time, each of which has 2 different shapes.The biggest part is that you can build all the blocks into a big robot. Easy to Build: A detailed manual is placed in the box, and children can get the works they want according to the instructions step by step. 5-12 years old and even older children can easily change the shape of blocks and build them according to their ideas with separator. Compatible with mainstream brand building blocks: The STEM constructiong robot is designed according to the standard of building blocks, which are compatible with most of the major brand.Kids not only can make engineering warcrafts and robot, but also they can DIY more creative models. Perfect Gift: This building block is suitable for 5,6,7,8,9,10,11,12 years old kids to play with their friends, you can also build with children on family day. It's a fantastic stem gift for you kids, nephew & grandson,whether boys or girls. Safe and Good Quality Blocks: The building block set is made of high-quality ABS material, to ensure that it will not cause harm to children. If you are not satisfied with this building toy within 60 days of purchase, feel free ro contact us please and we will send you a new one or unconditional return.