Geometric Optics Experiment Set Optical Lens Kit Convex Concave Lens Light Refract Reflect Physics Teaching Kid Science Gift

Hign-concerned Chemical : None Theme : Fantasy & Sci-Fi Warning : For use by children over 3 years old Certification : Europe certified (CE) Model Number : Optics Experiment Set Certification : CE Origin : Mainland China Recommend Age : 3-6Y,6-12Y Lens Material : Acrylic plastics Uses : Optics education Pre-purchase instructions: You need to install 2 7AAA batteries before use.