DD is only 4.5 so I'm conscious of probably being miles too early 
She is very interested in her keyboard so today when DH was watching the football I wrote the notes on the keys and showed her how to play a simple song and so a scale and she really enjoyed it - sat 'writing' her own songs by writing lists of the note names on a piece of paper. I'm not for a second suggesting that she is some kind of musical genius, more that she seemed to really enjoy it.
I used to play keyboards when I was younger, so would be able to show her some more basics/teach her to read music, which I would be happy to do if she was still interested. I worried about teaching her bad habits though, because I'm not fantastic and also very rusty! So should I leave alone, continue to show her what I know or think about lessons at some point?