Joshua can count

Joshua is doing great with counting. He can count from 1-15 then he needs my help for 16-20, then he can count from 21-19, 31-39, 41-49, 51-59, 61-69, 71-79, 81-89, 91-99. Then I say, very loud, 100. He is very proud and his favorite numbers are 31-39, I'm not sure why. I was going to video tape this but my camera ran out of batteries and I have no more. Maybe next time...