Material: STEM Building Toy Set is made of zinc alloy, which ensures the safe of children while providing a fun and engaging experienceEducational Toy: Model Car Kits Set is an educational toy that can assemble and disassemble parts, so that children can understand scientific principles, learn scientific knowledge, improve learning ability, and cultivate hands on ability and knowledgeAssembly Fun: Vehicles toy allows children to complete the assembly step by step. This process cultivate children's interest in learning and curiosity, and enhance their innovation and creative thinkingGift: Assembly Set Toys is suitable for children over 6 years old as a DIY toy, and is an ideal gift for birthdays, Christmas or other festivalsSize: The size of Educational Toy is 7cmx18cmx10cm, suitable for children to play Size Chart: 7cmx18cmx10cm/2.76inchx7.09inchx3.94inch Package Includes: 1 Model Car Kits Note: 1.This is not infant toy , please take away from children to avoid eating.2.Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.