I don't want to Grow Up!

Jacob:  Mommy? 
Mommy: Yes?
Jacob: I will love you no matter what.

Mommy: I will love YOU no matter what...

Jacob:  Mommy?
Mommy: Yes?
Jacob: If you don't feed me, I won't grow big...
Mommy: But I will always feed you.
Jacob: But I don't want to grow up bigger...

Mommy: *perplexed*

Jacob: I don't want to be bigger because then my costume won't fit....