Terms coined by four-year-olds in my class:

Mami Zami:  a city in Florida

Gorganic milk: self-explanatory

Brukka Brukka:  term invented by an ASD (autism spectrum disorder) kid, referring to small oddly shaped balls of dried clay.

Puppet school: where one of our little buddies went when he left our class.

Papa Johnny: no idea what this means, only that they say it loudly and repeatedly at random times.