A one-year-old in 24-36 month clothing

I am One, and what can I do?
I say Hiya, wave bye-bye too -
I can walk, I can run, I can dance, I can sing -
I am One, and I can do anything.

I am One, and what can I say?
With my hands I can say "Milk" ok,
And "Drink", "food" and "bye-bye" as you already know -
They half-dread the day that I learn "Uh-oh."

I am One, and what can I talk?
I can talk Didi drinking, Mama while I walk
To find milkness and cuddles and all things sublime -
I say Hiya and Dada and Eeeeh. I say Mine.

I am One, though you'd never have known -
I've started off big and I've grown,
And in terms of destructiveness, cuteness and poo
I'm at least 18 months. I may even be Two.