Let's count.

Ian: 1, 2, 3, 4, 5, 6, 7, 9, 10.
Mommy: 8. You forgot 8.
Ian: (lauging) 8, 9, 7.
Daddy: No, not 8, 9, 7!
Ian: 7, 8, 9, 10.
Mommy: 11!
Ian: 11!
Mommy: What's next?
Ian: (jumping up and down with his arms in the air) 13! 14! 14! 14!
Daddy: Close enough.