Some LeapFrog Explorer games allow you to customize the curriculum by entering your child’s own spelling list or focusing the game on particular math problems.  

These games are available at retail and include:

Spelling Games:
Barbie Malibu Mysteries
Wolverine & the X-Men
Disney Tangled
SpongeBob SquarePants Clam Prix
Sretchy Monkey 2

Math Games:
Disney Fairies Tinker  Bell and the Lost Treasure
NFL Rush Zone
Katt's Math-eriffic Magic Show
Roly Poly 2: Treasure Hunt

You can customize the curriculum in these games on LeapPads or Leapster Explorer handhelds by downloading LeapFrog Connect, connecting the LeapPad/Leapster Explorer to the computer,  and selecting “Skill Selector” from the left side navigation bar in LeapFrog Connect.