Among the many capabilities for jQuery, the one I find I use the most is using jQuery to run a blind box (a.k.a an Expanding-collapsing box). In case you are unfamiliar with blindboxes, below is an example; simply click on the pink box to collapse and expand the content within the box.
Blindbox Demo
This is the content for the blind box.
It can contain anything from copy to images to movies.
Click to open/close the blind box
It can contain anything from copy to images to movies.
Click to open/close the blind box