Introduce 21st-century skills like electronics and robotics—as students design and build with our action-filled circuits! Interchangeable circuit tiles snap together in every direction for endless exploration, and a variety of tiles let children experiment with light, sound, motion and more. Follow our guide to build 2-D and 3-D circuits—from a night-light to a beeping alarm—or let kids design their own creations! Set comes with 15 tiles; each measures 3" x 3". You also get a detailed guide with easy-to-follow instructions for 8 challenge activities. Requires one 9-volt battery (not included). Develops skills in building and understanding circuits, exploring early robotics and 21st-century concepts.