This series of mideer DIY activity kits covers a total of three different themes - sounds, optics and motion. It not only develops a child's motor skills, but also stimulates curiosity and introduces them to the basic properties of physics. DIY kit - musical instruments purpose:Demonstration of light refraction, reflection and the operation of lenses The kit can be used to create: Hologram projector – light refraction effects Kaleidoscope – mirror reflections Projection light – directionality of light beams Spectroscope – light spectrum analysis Kit contents: 6 printed papers 1 LED strip 1 PVC board 1 convex lens 3 mirror films 1 double mirror 1 one-way mirror 1 parchment paper 1 wooden stick 2 cardboard bases 1 EVA rubber 1 double-sided adhesive tape Educational benefits: Understanding optical phenomena Promoting scientific research Developing observation skills Great gift for: Students who love experiments, engineering, and discovery! Designed to educate future scientists and inventors. Age recommendation: 8+ Package size: 30 × 21 × 3.5 cm