Choose from 50 LeapFrog learning apps and download your own learning and fun! The LeapFrog? App Center offers even more ways to play and learn, with apps that reinforce--then take learning fun beyond--school skills. Use this card to download learning games, digital books, videos and more to your Leapster Explorer? or LeapPad? systems. Card value is $20 USD. Appropriate for children ages 4 to 9 years. Leapster Explorer and LeapPad systems sold separately. by LEAPFROG ENTERPRISES