Lunch-Box Dream

I am about a third through my book and so far the two families haven't had anything to do with one another. Within the families the characters seem to show different emotions to one another. Bobby and Ricky who are brothers seem to get on each others nerves just as siblings normally do. Bobby seems to love his family but not really understand them to well but he also doesn't want to make them mad. The other family hasn't appeared much in the book so far an hasn't done much towards the theme. As of right now the characters haven't done much to develop the theme but I assume latter on in the book they will have more of an effect on the theme and plot