LeapPad by LEAP FROG!  2nd Grade Dr. Seuss Cat in the Hat Book Based on the hit movie, the Cat in the Hat LeapPad book is specially made for 2nd graders who use the LeapPad learning system, LeapPad Plus Writing learning system and Quantum learning system (each sold separately). Kids can read and play along with their favorite mischief-making cat while enhancing vocabulary and reading comprehension. Punctuation, spelling and deductive reasoning are also taught in this fun and interactive LeapPad book.