How does Marly's family help Mr. Chris after his heart attack in the novel, Miracles on Maple Hill?

When Mr. Chris has his heart attack, his maple trees need to be tapped of their spring run of sugary sap, or he will not have the money he needs for supplies. Marly and her family not only tap their own maple trees, they help Mr. Chris's hired hand, Fritz, tap the Chrises' trees as well.