Cute mob

My suggestion is to add Koalas to the game. The idea would be that koalas have pouches and the babies would live in there. You could have eucalyptus trees (koalas can't drink water, so these are their only source of hydration) which drop their leaves for the player to tame the koalas. Once tame the koala could climb or jump on the players back.

These animals are endangered and bringing awareness of the habitat and behaviours could assist in prevention of these amazing animals.