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!
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.
DIY Line Rocks - to teach pretenders and writers learn words and shapes creativity to create this amazing resource! Cheap and easy to make - perfect for teaching pre-readers and pre-writers shapes, letter and number formation.