Put that calculator away and explore the world of numbers with this ancient mathematical tool! Aba-Conundrums give logic and reasoning room to move as children slide into real mathematical success! These 120 puzzles will have children shuffling their abacus beads up and down as they solve these clever conundrums and actually learn how to count using this multi-cultural ômachine.ö Aba-Conundrums includes a brightly colored abacus and spiral-bound puzzle book with 120 puzzles and solutions. Ages 9+