I know, difficult to believe what you need can't always be found on Pinterest. It's true.
Vintage Holiday, the secondhand shop in Holiday, has a dancing flower that is activated by motion. Jan, the heroine in Secondhand Samhain, uses it instead of a bell. No surprise, since she's a bit unconventional.
I know what it looks like, but readers might not. My books aren't picture books, so I have to hope readers are able to see what I do by my description alone.
However, enter Pinterest.
I took a picture of the infamous flower. I'm able to post it here and pin it on my Holiday USA board.