(work on writing) This free printable tracing lines busy bag for preschoolers is a great introduction to writing. Preschoolers will have fun tracing the lines and practicing their fine motor skills.(work on writing)
Simple Hands-On Activities That Help Build Fine Motor Skills - with fine motor skills going missing at preschool, try some of these hands-on invitations to help strengthen fine motor skills you clever monkey
17 Ways To Build Fine Motor Activities Into Your Curriculum
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.
Use finger aerobics in the classroom, home or therapy clinic to work on fine motor skills needed for functional tasks. Hand aerobics are a great fine motor exercise workout before handwriting tasks for the whole class! Perfect for the school based OT.