Build your own maze, then follow the step-by-step coding cards to create a path for this programmable mouse to race through on its way to the ultimate prize—cheese! This deluxe set offers a hands-on introduction to the world of coding as you create seemingly endless, unique maze paths. Watch in amazement as the mouse lights up, makes sounds and showcases its speed! Includes: 16 maze grids, 22 maze walls, 3 tunnels, 30 double-sided coding cards, 10 double-sided activity cards, a cheese wedge, the mouse, and an activity guide. Requires 3 "AAA" batteries, not included.