I brought my cell phone and would play the different tones and asked them to listen to them and think what kind of promptings they would represent. The happy tones represented the Holy Ghost letting you know that something was good. The tones that sounded scary were warnings. The tones that were peaceful were comfortings. The different sounds from the cell phone could actually help them feel things and associate those feelings with promptings.
It really turned out great...hard to describe, but even the sunbeam kids loved it!