I know, flowery... One of my best muso friends at school was a double bass player. Her first car had to be a Volvo estate... 
I like the cello a lot, but wonder if I should try and gently steer her towards an instrument that she can be taught by a friend in the initial stages ? I have french horn, bassoon, harp (although that has even worse logistical issues that the double bass), flute and trumpet covered without having to go outside close family friends. Recorder I can start her off on myself and thereafter have a friend who is a professional recorder player...
I'd like to start her on piano probably. Because I "fell" into music rather by accident, and didn't have musical parents, I never had piano, and I couldn't get through A'level music without it.
I'm also not sure how early is too early ? both for piano and a second instrument. I started recorder at about five, trumpet at eight (well, cornet, actually, in a brass band
. I switched to trumpet at 12 when I went to 'posh' school - they had an orchestra, rather than a brass band, obviously), then flute at nine after seeing James Galway on TV.
I have been thinking about suzuki method. It was very much frowned upon when I was playing, but seems to have become a bit more mainstream/accepted now - probably in part because of the number of hugely successful concert violinists/pianists who started with suzuki. I know they start that as young as three... but that might just be a bit nuts.
Sweets will definitely be being used as bribery for good behaviour. As will the promise of ice-cream in the interval. She's also very excited about the prospect of a 'big girl's night out' in her best frock with "just mummy" ? no annoying little sisters or Daddies.
I'm determined that music will be a part of my DDs lives whatever happens. Even if they're not especially talented, I think an appreciation of classical music is really important, as is the discipline and commitment that learning an instrument provides.
Maybe I'm deluded. We'll find out...!
I shall wear my "impervious to cats bum faces" glasses á la your Dad, Coconut... 
db
xx