Montessori Ten Board Set Exploration of the numbers 10-99 and their sequence is possible with this beautiful hardwood set. Consists of a wooden box with lid containing two ten boards with the numeral 1-9 printed on nine of the number slots, Plus 9 wooden tablets with the numerals 1-9 printed on them that slide over the zero on the number slot to create the written ten symbol. Ten beads and box are sold separately. See M6320