All the credit goes to Bear for discovering this:

One of Lucy's receiving blankets (that we picked up second-hand) GLOWS IN THE DARK!

I was already a big fan of this blanket because it had sheep (which I get overly-excited about) and stars (which are my favorite shape). But then, the other night Bear came downstairs to sleep on the couch (because Lucy was being fussy and he had a big test in the morning). And there, in the dark, he noticed the glow. The sheep and stars I'm so fond of? They GLOW!

It is THE COOLEST BLANKET EVER. Since sharing his discovery I have been heard (at random moments) pontificating on the sheer awesome-ness of the glowitude. However, there is some question as to whether Lucy (when she's old enough) will appreciate it anywhere near as much as I do.