Fun Learning With Number Cards

I bought a box of Sesame St. number cards at the mall several months ago. Yohan already learned how to identify numbers in his Nursery class. In Kindergarden, I was told that students will learn how to spell numbers 1-20. I thought it was a good idea to teach him to spell a few numbers during summer vacation so I brought out the Sesame St. cards. Yohan carefully arranged them in order as you can see in the photo below.