Description: Material: This STEM science experiment toy is made of high quality wood, ensuring durability and longevity. Product Dimensions: The DIY invention kits has a compact size of 9cmx9cmx5cm, making it easy to handle for young inventors. Package Contents: The package includes 1 complete set of the "Open Door Robot" DIY kits. Educational Toy: This product is an excellent tool for primary school students to learn and understand the principles of technology and engineering through hands-on experiments. DIY Invention Kits: It encourages creativity and innovation among children by allowing them to build their own "Open Door Robot", enhancing their problem-solving skills in the process. Specification: Material: Wood Size Chart: 9cmx9cmx5cm or 3.54inchx3.54inchx1.97inch Package Includes: 1 SetDIY Remote Control Experiment Toy Note: 1.This is not infant toy, please take away from children to avoid eating.2.Please allow slightly errors due to manual measurement and different monitors.