LeapFrog Leapster The Batman Strength in Numbers Learning Game Pre-K-1st Grade LeapFrog Leapster Learning Game featuring The Batman Strength in Numbers is designed for children in Pre-K through 1st grade, typically ages 5 to 7. This educational software works with all Leapster systems and focuses on essential mathematics skills including counting, skip counting, odd and even numbers, and addition and subtraction. Players help Batman defeat villains like Cluemaster, Firefly, and Mr. Freeze by solving math-based challenges that automatically adjust to the child's skill level. The game includes tailored tutorials to help teach new concepts in an engaging, superhero-themed environment. New and factory sealed in original packaging. #Contemporary