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.
Fine motor maths activity - counting using pipe cleaners and beads - my kids loved this today! This is just an image with no link to a website, but I think it would make an awesome math and fine motor center in any special education or kindergarten clas