Sauerkraut. Amazon carries Sauer Frau sauerkraut (plain, mustard, or caraway) in squeezable containers. The three-packs are over $25, but singles and two-packs are under - well, depending on shipping.
Sponge dinosaurs.
Cheap, fun and almost guaranteed to be used immediately-Silly String.
While Sansevieria can survive low-light conditions, they prefer full sun, and when grown well produce small, highly fragrant white flowers
A shower curtain. I rather like this one, personally:
We have several, but they’ve never flowered.