The first 45's I remember buying (well, my mother actually bought them!) were "Puff the Magic Dragon" by Peter Paul & Mary and "The Birds and the Bees" by Jewel Akens. They weren't for me, but for my neighbor and best friend for his birthday. I think it was his 5th! The first I remember for myself was "Downtown" by Petula Clark. All those songs still make me smile for the memories they bring to mind.