The Decanomial Bead bar box has 55 of each bead bars from 1 to 10. This allows the child to construct all 100 outcomes of the decanomial :- 1×1, 21×2, 1×3…..10×8, 10×9, 10×10. This is extremely powerful for aiding a child’s understanding of multiplication of numbers, the squares as well as the Pythagoras board, also numbers, place value calculations and Arithmetic is easily understood with the help of the decanomial bead bars. The Bead bars come in a compartmented storage bx with a lid