Description: 【Educational Tool 】: This comprehensive physics mechanics experiment kit enriches children's extracurricular, helping to develop practical skills and reinforce their knowledge, thereby enhancing their learning experience 【 Material】: Crafted from PP, this Mechanics Experiment Box ensures durability during experiments, making it a reliable choice for young learners exploring the principles of physics 【Compact】: This experiment set is designed to be compact yet comprehensive, providing all necessary components in a manageable size for easy storage and use 【Complete Set Included】: The package includes a full set of tools needed for conducting various experiments related to levers and pulleys as well as principles, offering a complete hands on learn experience 【Gift】: This lever pulley system set makes an ideal gift that combines education with fun, encouraging curiosity and exploration in the field of science Size Chart: Box Size 35cmx19.5cmx17.5cm/13.78inchx7.68inchx6.89inch Package Includes: 1 Set Mechanics Experiment Box 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.