Isaac Campion by Janni Howker - In what ways could it be said that 12 year old Isaac is more grown up than his father?

It could be said that twelve year old Isaac Campion is more mature than his father. This is because he is very sensible and responsible for his age whereas his father can behave very thoughtlessly and childish at times.
Isaac's father Sam acted rather childishly when his own son died. He was only worried about revenge. It wasn't really anyone's fault Dan had died. "A cruel accident" that was all it was, "just two half grown lads larking about." The problem was one of them happened to be Dick Lacey. There had been a sort of family feud going on between the Lacey's and the Campion's and Sam…