Marsupials

[Greta]

Marsupials are small mammals that are attached to the male body and as in [the animal] kingdom spend most of their life in a [pouch]. Only [jumping out] to surprise people!

[Ernesto]

a type of mammal from Australasia or South or Central America that is not completely developed when it is born and is carried around in a pouch (= a body part like a pocket) on the mothers body, where it is fed and protected until it is completely developed: