I made these talking tickets for a kindergartner who was always blurting out. I would give him a designated amount of tickets each day to use. When you wanted to ask a question or tell me something unrelated to what we were doing, I would ask him if you wanted to use one of his tickets. Initially he went through his tickets very quickly, but soon started to learn what was worthy of using a ticket for and what he didn't want to waste a ticket on to say. The amount of times he blurted out significantly reduced.