The VTech PJ Masks Super Catboy Learning Watch is a great wearable gadget for children! Not only will this watch show you the time, there is an alarm, timer & stopwatch functions. There are also 4 built-in games to introduce and reinforce the learning of numbers, shapes, counting and basic addition as you go into the night to save the day with Catboy, Owlette and Gekko! Watch includes 9 interchangeable digital clock faces and super cool glowing amulet design! Chase Romeo in the Gekko-mobile and learn shapes, solve addition problems to help Owlette chase down Luna Girl or find the largest or smallest numbers with Catboy! Requires 1 x CR2450 (included).