I think you could also have multiple pipe cleaners coming from one number and students have to show multiple ways to add numbers to get to that number. Counting with pipe cleaners and beads. Great for fine motor development too.
Preschoolers will love this FREE printable cookie jar number matching game. Includes numbers with two levels of difficulty. One jar shows numbers and another jar shows number words for children learning to read.
Lots of good math ideas like this one, Using cotton swabs to paint ten frames and twenty frames and SO MANY MORE GREAT IDEAS on how to build number sense in First Grade and Kindergarten with a lot of pictures! Must read!