Well, interesting post! So, here are my thoughts - without any pre-judgement, others may, and will, vary. 1) If GMRS works where FRS doesn't it is just because of the power difference, and maybe the wider bandwidth. But, the downside besides having to talk other families into getting licensed (although, that is probably a good thing in-and-of itself), is more expensive equipment, heavier equipment and shorter battery life. 2) It is not, per-se, a bad idea. But, that does not mean it is a good idea. My guess is the kids will tire of playing radio fairly quickly. If the use of the radios was integrated into some other activity, like board games or online gaming, that might have a longer lasting appeal. But, I do wonder if young kids will take the rules of good operation seriously and not just yell stupidities at each other for 10 minutes before tossing the radios into a drawer. 3) Yes, some other users will be pissed off. But, many won't. You have as much right to the channels as they do as long as you and your family operate in a legal manner. 4) No such thing. But, I would not use PL. That might give the kids a sens that the channel is clear, and they might not hear someone telling them to talk less, yield the channel, etc. 5) FIRST, you need two ask the repeater owner, even if it is an open repeater. But, it is always ok to ask and if the owner laughs at you, well that would be an indication of his/her poor attitude, and no mark against you. Good luck and tell us how or if it goes.