Create a step-by-step path for this Programmable Robot Mouse using the 30 double-sided coding cards for a hands-on introduction to coding concepts. The mouse lights up, makes sounds and features 2 speeds, along with colorful buttons that match the coding cards for easy programming and sequencing. Includes an Activity Guide. Use with the Robot Mouse Coding Activity Set (LER 2831) for more play options, learning and fun! The mouse measures 4 in long and requires 3 AAA batteries, not included. Size: 16.3 x 16 x 6.6 cm. Ages 4+.