We used the chalkboard to have a Fish Race!
I cut out 4 fish with construction paper and put them on the board with sticky-tack.
Then I drew12 circles alongside each fish.
We placed number tiles in a bag from 1-3 and each took turns picking a tile from the bag.
Whoever's fish got to the finish line first won!
We played this many times and it was a blast. Even if you don't have a chalkboard, you could do the same thing easily on paper.