You don’t have to be a grown-up to realize what a difference giving back can make. In May, after doing some research on Cure Alzheimer’s Fund, a group of second-graders from Ellis School, a K–8 public school in Fremont, N.H., put fliers around the school, made an announcement over the PA system and reached out to their families to support Cure Alzheimer’s Fund. Afterward, the children sent an envelope with a short letter, signed by Nate Levine and Kyle Brown, with $83.17 enclosed. The note said simply: “We hope this helps.”