In Captivate 8, how do I create a click box containing text that will make a text box appear when the user clicks it?

I’m pretty sure I’ve done this before, but I can’t remember how. The screen contains five choices (clickable text boxes). The learner clicks one, and a box appears with text related to the clicked box. There is no wrong or right selection, and the user can stick around on the screen clicking and reading for as long as he/she wants. Thanks in advance.