LeapFrog Didj Educational Gaming System Software: Nicktoons

Battle robotic clones to save the planet! Invader ZIM has a sinister plot to overtake Earth. You'll do battle as SpongeBob, Danny Phoantom, and El Tigre as you harness their special powers and your math skills to defeat the forces of evil! And, you can customize the game online with the math skills you're studying in school. Teaches one and two-digit addition and subtraction, division (1-12), and multiplication (0-12).