Learn more about LeapFrog Leapster Explorer Apps at . br br Fire up your engines and compete in new Bikini Bottom challenges with SpongeBob’s pet, Gary. This is no snail’s pace race! Build spelling skills on 4 wacky new tracks! You must have the SpongeBob SquarePants Clam Prix cartridge game to play with this Expansion Pack.br br Leapster Explorer™ is the electronic handheld learning experience that encourages children to discover something new every day with endless ways to play and learn - from games, e-Books, videos, and online play to customizable learning skills and more.