atleast one

I happened to overhear the following conversation between Daivik and his mother.
"Mummy, I want one chocolate"
"No, I will give you two"
(giggling), "Okay, give me two"
"No, I will give you three"
"Okay, give me three"
"No, I will give you four"
...this continued until twelve, at which point an exasperated Daivik said :
"Can you give me "atleast" one" !!