@tyme they do! the youngest will run from another room when he hears the song but he’s still a bit young so just watches and the oldest’s loves it and will copy it, if there’s any game in the show he will ask us to “play bluey” with him and copy it or he’ll say “Oh biscuits!” Hahaha 
they are both girls actually but you wouldnt know that when you watch it they don’t really make it clear probably on purpose