Magic Singing potion

Apparently today in primary during singing time, they sprayed "magic singing potion" into the kids' mouths to "help them sing better". Fina was telling me all about it when we got home. She said, "it tasted just like juice!" Then she sang a song to me and asked "Don't I sing better now that I've had that magic singing potion?" (answer: no. I've never heard her sing more monotone and chantlike) but I told her yes and she said, "Yeah, it's really too bad they didn't give you any."