Clothespin Math on a clothes hanger! LOVE this. Easy to make, and self explanatory. I'm thinking a wire clothes hanger would work better, so the clothes pins are easy to slide back and forth (almost like an abacus).
Laminate a number ladder, cut small slits in top & bottom & add a pipe-cleaner with a small bead. Use the bead to slide up & down as you complete addition & subtraction problems. Or Make a number line instead.
Counting Numbers Matching Game Using Plastic Easter Eggs. *When making this activity, make sure to not let the eggs match up in colors! Separate all the eggs first, put them back together with a non-matching color and then write on the eggs.
Preschool-Kindergarten Math Teen Numbers Song I feel like this song could be better when teaching a kindergarten or preschool class I would look for something more up beat. However the song is a little catchy and gets the point of counting across.