I have done two live-aboards with my teenage sons and I am getting ready to do a third this fall. We did one in the British Virgin Islands and one in St Vincent and the Grenadine Islands. We had a great time. They were completely entertained by the diving, talking to the other divers. For the "hang out" times, they brought their Game Boys and iPods. They are also both book readers. We never encounter the "I'm bored". Many times they would even go back into the water and and snorkel when they weren't diving.