Warning: Choking Hazard - Small Parts. Not for children under 3 years.Grades K - 4. Target reviewing math skills with our fun to play Multiplication bingo game. Increase difficulty by increasing skill levels because each bingo game develops problem solving skills, increases computational speed and really gets students thinking quickly. Each game has everything you need for 36 players with over 200 chips, caller's mat and cards. Made in the USA.