You may recall that the Junebug at this age stayed on brand with a very strong message of MAMA DON'T SING. Rocket, however, is my little music lover. We have had to put our foot down and stand firm on ONE song every night before going to sleep.
For a long time every single night's request was "the diamond ring song" (Hush Little Baby).
This has recently been broken up by frequent requests for "millions of degrees" (Why Does the Sun Shine?).
A strong third is "Roy G. Bivot" (Roy G. Biv).
And, because I have been on a folk song kick lately, his latest obsession is "ladies fly home" (The Seventh Girl).
My understanding is that Mr. E gets other requests sometimes, but I don't know what they are.