The race is on to build hands-on coding skills! Build your maze, and then use the coding cards to create a step-by-step path for Colby, the Programmable Robot Mouse. Program the sequence of steps, and then watch Colby race to find the cheese! This deluxe set includes 30 double-sided coding cards, 10 double-sided activity cards, cheese wedge, and Activity Guide to provide the perfect hands-on introduction to coding concepts. Create your path with 16 maze grids to create a 20 x 20 maze board, 22 maze walls, and 3 tunnels for endless possibilities. Colby lights-up, makes sounds, and features 2 speeds along with colorful buttons to match coding cards for easy programming and sequencing. Add multiple players with Jack, the Programmable Robot Mouse (LER 2841), sold separately. Colby measures 4L and requires 3 AAA batteries (not included).