I think my first taste of music was when I wasn't even born. Mum told me about a festival in 1983 (I turned up in 1984) when she was watching a ceilidh band playing. Apparently she then felt little kicks inside her and I was dancing in the womb!!
My first experience OUTSIDE the womb was probably at my parents' folk club in Doncaster, South Yorkshire. I used to get passed round all the folkies there (I was only 2 or 3 months old). My first festival was when I was 4 months old (Wath, May '84).
I can't remember not singing, I started cello when I was 9 (stopped when I was 14), Keyboard came along at 15, and I play bodhran, seriously for a couple of years and messing about since I was about 10.
I was in a folk group about 6 months ago as well. For more info, see my profile.