(Ages 4-7) In these games, children first learn how our number system works, then they learn to add and subtract numbers up to 100. The activity books introduce key ideas, and children apply these ideas as they play the games. CURRENTLY NOT AVAILABLE Contains: 2 Blocks-of-100 2 Digi-Boats Activity Books Games Game Pieces Game Cards "On Board" Math Learning Kit 040-0600$50.00