Beyond this one thing, I've been thinking about this a fair bit recently, because Morgan has been wanting to synchronize me turning off her bedroom light with her turning on her reading light, when I'm putting her to bed. And for a while she was mashing things together like "One, two, three, ready, set, go;" but now she's settled on a sort of four-line children's rhyme that ends with "Who's your girlfriend, I forgot; is it A, B, C, D, or E?" with the action synchronized with "E".
Crossposted from Dreamwidth (original here), with comments. Comment here or there; comments here will eventually be duplicated to there.