I think it definately helps to use a bulb vase type pipe so they can just heat it without burning it. I sit down and tell them how to do it. It's such a privledge!!! I tell them it's not like a cigarette or a bowl. so, just draw it in slow and steady. The more you suck on it won't increase the smoke, you have to keep the lighter going and heat it for that... Don't start inhaling 'till it's melted and you see the smoke... Then just keep heating and go slow and steady. I say just hold it in as long as you can. If they cough, i say, "that's cool... just get back on it." After 10 seconds or so, I offer them the pipe again, and when they shake their head, like "nope... nope..." then I know that's it.
I tell them it's like smoking a plastic bag, and.. don't worry about it... and then I just let them be, and watch their heads roll around, or watch them look around from side to side while they take big slow intermitent deep breaths.. and I'm like