Counting with pom poms. Here is a simple counting activity for children, especially preschoolers. Simple to set up it can suit individual needs and develops fine motor skills.
Number matching activity for kids - Laughing Kids Learn
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.
Classroom Door - Road to Success