For this activity, you will need to use 4 different colored clothespins.
Use the markers or crayons to paint each edge of the cardboard in one color.
Mix the clothespins.
Instruct the child to order the clothespins by matching the edge color to the clothespin color. The child should be using a different finger for each clothespin color (i.e., thumb and index finger for a yellow clothespin, thumb and middle finger for a red clothespin, thumb and ring finger for a green clothespin, and thumb and pinky finger for green clothespin).
For grading place all mixed clothespins on the cardboard and ask the child to pick them up and re-attach it to the right edge.