WINDOWS 98 2000 ME XP VISTA WIN7 WIN8 Writing Parts of Speech Complex Vowels "Carry Over" Addition "Borrow" Subtraction Endless Fun The adventure starts in a creaky elevator hidden in the schoolhouse wall. Follow CJ the Frog and his sidekick Edison on a journey into their secret clubhouse. Use your math, science, grammar, and other skills to solve the many challenges found in 22 interactive games.