That's great that they are all interested in birds, and phoenix do seem to be great for kids. I have sent may to young kids and it's always nice to hear back how well they did at shows and all with them. Got a young girl in Florida that's winning about everything she enters with hers.
I think the pullets will not be DQ ed at APA shows, the male would for sure. So try them and see how it goes and with time, just work toward breeding you some better birds for future trips. Within no time, they'll have some excellent birds going for sure as long as they keep the fire going about doing it.