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.
Two preschool math activities using Duplo Legos. These are great for younger brother while the older ones do their schoolwork! Identify the next number in a series of numbers up to ten. Pre-school age 3 and 4
Top 21 Free Printable Number Coloring Pages Online
10 Easy To Learn Number Coloring Pages For Your Little Ones: This is a list of the top 10 number coloring sheets that you can use to introduce numbering as well as coloring to your kid. Not a fan of coloring sheets but I could color them to hang up