No toques eso, está sucio

Ten cuidado con la mascota (or ten cuidado con el perrito)

tan sólo ten cuidado.

His name can be said at the begining or at the end, but because he is a kid say it first so you’ll get his attention first.

I love you (for the little kid) te quiero mucho

You are sweet (eres un dulce or eres una ternura)

little nephew (pequeño sobrino)

How do you say….? ¿Cómo se dice?

Good luck with your peruvian relatives (I’m peruvian too!)