Could also connect a bunch of locks and put all the keys on a key ring. Lots of pictures of latch, lock, etc ideas for montessori type preschool. This lock one could be made with 2 boards, some o-rings, and some locks from Dollar Store.
Have the students pick a number. Count that number of sticks. Make a design and recreate it with the same color markers on paper. Love all of the components! Great for creative fine motor/visual motor practice