Material: Made from pp material, this mechanics experiment set is designed to withstand use while maintaining its integrity. The sturdy construction ensures that students can focus on learning without worrying about equipment durability Physics Learning Kit: This physic teaching equipment set offers a hands on to understanding key physics concepts such as the principles of Archimedes, the balance of forces, and friction. It's an ideal tool for middle school students to learn and grasp fundamental mechanics Feature: This experiment set is designed to be compact yet comprehensive, providing all necessary components in a manageable size for easy storage and use Educational Tool : This physics mechanics experiment kit enriches children's extracurricular, helping to develop practical skills and reinforce their knowledge, thereby enhancing their learning experience Great Gift: This lever pulley system and archimedes experiment tray balance set makes an ideal gift that combines education with fun, encouraging curiosity and exploration in the field of science Specification: Material: PP Size Chart: Package Size: 36cmx22cmx13cm/14.17inchx8.66inchx5.12inch 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.