When my kids were small they referred to both kangaroos and wallabies as "kangawallaflopses" - a word that is still used in our house. On the south coast of New South Wales is a lovely spot called Pebbly Beach where the kangaroos come out of the bush onto the beach. Although they move amongst humans fearlessly they are still wild animals, as the occasional tourist has found out. When my older son was about 8 he was eating some food - bread, I think - at Pebbly Beach and was attacked by a hungry roo; neither was hurt although Stephen was a bit shaken up!
In Canberra the Governor-General's rather nice house has large roos in the backyard (it's a big backyard), they come into suburbia.
But I still reckon the King and Queen of them all is The Wombat.
Cheers
JennieG