The latest Leapfrog Leappad tablets specially built for children both offer wi-fi and a choice of 500 apps and games to buy. Should I Buy The LeapPad3 And LeapPad Ultra XDi? The specially built-for-kids LeapPad3 and Leappad Ultra Xdi are similar in specs and functionality. The larger, 7-inch, Ultra XDi has twice the storage as the 5-inch LeapPad 3 but younger children may prefer the 3's