Ten (episode)

1 sees 9 and asks what's wrong9 says he never gets 1 bigger when he sneezes.

Then, 1 has an idea!

9 + 1 = 10

I am 10! Say it again!

10 - 1 = 9

9 asks why there's a 1 on top, and 10 sings her song about being a 10 block.