Using the Tens Boards, the child explores the number names of the tens and the sequence of numbers 11 to 99. Bead quantities are created from the 10 bars and unit beads in the Tens Bead Box sold separately and are associated with the corresponding numeral on the Tens Board. Includes a wooden box with lid containing 2 Tens Boards and 9 wooden cards printed with the numerals 1 to 9. 1 board has five printed number slots 10 to 50 , the other has four printed number slots 60 to 90 .