Preschoolers working with numbers

On Friday in preschool we decided to make our own playdough and cut out and decorate numbers 1-5.
Both children know their numbers and quantity so well now, they are even really great and knowing 1 more than or less than numbers, little smarty-pants!
No cook playdough recipe
2 1/2 cups flour
1/2 cup salt
2 tsp cream of tarter
2 cups boiling water
3 tablespoons oil
2 packages KookAid or food color and extract
Combine all ingredients well, store in ziplock bag