Cuddly koalas, cuddly koalas (cradle & swing arms)
Possums too, possums too (possum eyes - circle with finger & thumb brought
up to eyes)
Wallabies and wombats, wallabies and wombats 
(little bounce/jump/bend knees
with hands in front, rather like begging action)
Kangaroos, kangaroos (bigger jump, more exaggerated hands)