Nobody can deny how sweet and cute some young children talk; they make you laugh by the way they put words together and it's mainly because of the thought behind it or minor grammatical mistakes. When you're delighted by a child making some funny statements, what words would you use to describe or to refer to them?
A: Yes. Mosquito want to eat me and I chase him and I tell don't come here.
B: Aren't you a little [the word].
I'm open to adjectives too and it doesn't need to be the words to address a child himself/herself.