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 lantern to a spinner—or let kids design their own creations! Set comes with 34 tiles; each measures 3" x 3". Detailed guide features easy-to-follow instructions for 10 challenge activities. Requires two 9-volt batteries (not included).Additional Information