Tech help for Wordpress

Yes, I know it’s mildly ironic I’m asking on Blogger. (The switch will be soon.)

I am looking for either some coding or a plug-in that would cause a text box to pop up when words were moused over or clicked.

As far as the application, I’ll be writing a lot of recipes and I’d like to have tips for novice cooks available, but not cluttering up the screen for more advanced readers.

Ideas?