ALL INCLUSIVE: Kids use copper tape to carry electricity from included batteries to LED lights. STEM EDUCATION: Learn about circuits switches diodes and schematics with the easy-to-read project book. Manufacturered by Let's Start Coding. MORE THAN MOST: Contains 15 LED lights 12 batteries 15 feet of copper tape 8 markers. GET CREATIVE: Easy-to-use wide copper tape plus materials to build more projects after completing the projects. NO MESS: Fun STEM Activity for ages 8-12 with no mess! No glue glitter slime or sticky food.