No extra tools required, allowing kids aged 6-8 8-12 to finish DIY assembly easily with clear graphic steps, perfect for beginner STEM projects LEARN THROUGH PLAY: Transforms abstract concepts like circuits and conductivity into tangible experiments. 6 COMPLETE FRUIT BATTERY STEM KITS: Includes 6 individual science kits with copper/zinc plates, electronic clock, RGB LEDs, wires, clips & clear instructions. Great stem projects for kids ages 8-12 that develop problem-solving and engineering thinking PERFECT FOR GROUPS & CLASSROOMS: Available in 6-pack bulk quantity, these bulk STEM kits and school supplies are perfect for classroom group learning, school science fairs, summer camps, kids science party favors and home learning activities.