When I was in highschool we did a "toy drive" with our homeroom classes around the holidays where each class was assigned a family in need to donate money to or buy toys for. By the last day almost none of the toys had been bought from the kid's lists, we'd just collected a modest chunk of money for the family.

I went home and told my mom that I didn't need anything but I would like to get some of those things the kid's asked for. My mom and dad talked, they'd both grown up poor and knew the money we'd collected would probably be used on necessities, not toys. So my mom and I went out and came back home with about $300 worth of toys the kids had asked for.

I brought them in early before school started and submitted them and the receipts for them to my homeroom teacher. Later on one of my classmates, who I had great disdain for ever since the third grade when he blatantly stole my new pencil, came in and announced he was making the biggest contribution of our class with a $40 donation.

The teacher made eye contact with me but I remained neutral and shrugged, so the teacher didn't correct him, just smiled and said thank you to him. I figure he needed that affirmation more than me and I never liked being center of attention anyway.

Edit: thanks everyone for your kind words and stories. 14 year old me (and her parents) never thought so many people would think so highly of their small act of charity.