I made a playlist of songs from my childhood. This is just a small sample of what would make up the soundtrack to my life then; almost any Elvis song would count, and most of the later Beatles, any hippie-ish 60s music, new wave 80s, or mid-90s pop or country. But these are the songs I loved the most, or that were special for some reason or another, or that just send me back in time when I hear them.
This goes from my earliest memories up to about age 12; after that I liked so much different stuff that it's hard to pinpoint a few specific things as special. I like that you might get a completely different idea of how old I am depending what songs come up.