This can help students with 10 frames 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!
DIY Math Games Ideas to Teach Your Kids in an Easy and Fun Way
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.
Ice Cream Numbers - preschool summer math that explores fine motor skills, counting, one-to-one correspondence, and more early math skills Mehr zur Mathematik und Lernen allgemein unter zentral-lernen.