The 6 boards (for a small group) have 2-digit numbers in base-10 in each box.
The game comes with three sets of calling cards so you can choose which set is best for your group of kids:Set 1: numerals (46)
Set 2: words (forty-six)
Set 3: expanded form (4 tens 6 ones)
I print each of the cards on differnt coloured paper and laminate them (actually, I always print, cut, laminate and then cut AGAIN! I find a small boarder of laminate stops them from peeling and they last lots longer). I dab a bit of glue on the back of the cut out cards when placing them on the laminating sheet so that they don't move and go wonky.
Find the game here.