Here's something weird.
We recently acquired a swing for MG exactly like the one we used for baby Liam. (That was my sister's.)
It's a great swing, 3-directional with lights and a mobile and a WALL PLUG, and four sound settings including one of nature sounds. I love those chirping birds.
Anyway, one of the sound settings is a series of songs, which has been playing intermittently for a week now. And every time I hear one of the songs, I start thinking of The Hunger Games. Characters, impressions, specific scenes and conversations - they play and replay in my mind. It took me a while to figure out why.
Last time I had a newborn, I read the Hunger Games series for the first time - mostly while my baby was sleeping or rocking in the swing. The swing songs played over and over while I read of oppression, terror, violence ... and the scenes stuck in my mind are inextricably connected with the baby tunes. Weird.
I remember hearing once, maybe in college, that you should study with Mozart (or similar music) playing in the background. Supposedly the music helps you commit information to memory.
I didn't utilize the tip much, but now I'm thinking I should have. There is clearly some potential to be tapped there.