Need Ideas on To Kill a Mockingbird Please!?

Well, how about when he gets his arm broken, surely that's a significant moment. Or else when he realises that it was Boo who put the blanket round Scout at the fire and who put the presents in the tree because in the novel these are only described from Scout's point of view and she doesn't understand what Jem does at those points. Thats what i would do anyway :) Good Luck