Anyone got any good games/tips for awkward teens (2 brothers, 2 sisters) who only see each other about once a year but will be sharing a table at Christmas? Previous meals have ended up with the girls talking non stop and showing off and the boys not uttering a word for the whole meal. Could do with some ice breakers to level the playing field. We do mix the seating up so it's not a kids/adults end, but it's really hard to get the boys involved in any conversation! Any tips gratefully received!