This is the easiest and most fun technology value set for beginners - create, connect and experiment with circuits and magnetic circuit inventions. This puzzle for electromagnetism, physics and math learners is simple to use and is the perfect hands-on lesson for teaching thinking, engineering skills and creativity outside the classroom or school. It is loved by teachers, parents and DIY enthusiasts and is used as a development tool by educators in classrooms, summer camps and schools around the world. Customers need to assemble it themselves Type: Circuit Experiment Kit Power Supply: 2 AA batteries (not included) Application: Physical Circuit Learning Experiment Circuit Experiment Kit, Physical Laboratory Learning, Scientific Research, Principle, Experimental Equipment Note: The color of accessories is random and not specified. Please read carefully before purchase. It contains small accessories and small objects, and children should be accompanied by adults to complete it. Please protect children and avoid swallowing. Color: Yellow Material: Plastic Package Contents: 1 Set x Circuit Experiment Kit Only the above package content, other products are not included. Note: Light reflection and different monitors may cause the color of the item in the picture to be slightly different from the actual item. The measurement error is +/- 1-3 cm.