I had to do a search to figure out what an air plant is. Now I know what you mean.
As for your description I'm now thinking about a chia pet. Which brought me to chia.com and then I found out they also make The Clapper. Who knew? Clap on, clap off, the clapper! Clap, clap.
Now I'm lost watching old commercials.
As for your lost item, the location will either pop into your brain at a random point in time or it'll make itself be found. This is what I usually experience haha