Features: STEM set ,this diys electric barrier model helps students grasp circuit principles and automation basics through hands on assembly, featuring a motor, sensors, and control modules for practical learning. Exercise your children practical ability,train your children observation capability,thinking and analytical skills Quality materials,the hand crank generator make of wood materials,full of durability.fashion. Wonderful gift,sweet warm gift for kids,students. Complete science experiment set includes pre cut wooden/plastic components and detailed instructions, enabling seamless assembly without additional tools. Specifications: Materials:Wood Package Includes: 1 Set diys science experiment materials note: Please allow 1-2cm errors due to manual measurement. Due to the difference betweeen different monitors,the picture may not reflect the actual color of the item.