Little one's go to adjective to describe different objects of the same type is big/small. Which is really fun typically to talk about different body parts being big or small with absolutely zero shame, or regard to reality really. Everything he and mom has is small everything I have big. My nose big, his and moms nose small. My belly big, his and moms small, although my wife is fat and I'm skinny lol. My butt's big, etc. Doubly funny because the german word is groß, and he says groo-groo a bit like "Wooah-wooooah!".

Unfortunately he started identifying penises and now talks about how he has a small penis and I have grooo-grooooo! penis, which is hilarious yes, but I worry that if he points out his penis in kindergarden the teacher might say "yes, just like your dad" and he might reply with "Papa! Groah! Groooaaah!"