Is it possible to add an optional "Help" button?

I'd like to add an optional help button to a few slides. Currently, the learner hears audio and is instructed to click something on the screen. I have a click box that pauses the slide until the learner clicks. I want to add an optional help button that can be clicked and pops up help text if the learner is unsure of what to do at this point. However, the help button cannot progress the slide. The learner must click the click box.