25 IN 1 : There are 573 pieces building blocks in the box, and we offer 25 different building suggestions. Kids can build 12 mini construction trucks of different shapes at the same time, each of which has 2 different shapes, or 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. Toddler can easily change the shape of blocks and build them according to their ideas with separator Good Expansibility: The City Project Mecha is designed according to the standard of building blocks, which are compatible with most of the blocks in your home.With this set of building blocks, kids can make engineering cars and robots, and they can DIY more creative models Best Gifts: This building block is suitable for kids to play with their friends, and you can also use it to build robots with children on family day. It's a fantastic gift for you kids, nephew & grandson Quality Product: The building block set is made of high-quality ABS material, to ensure that it will not cause harm to user. 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