If you want a small and easy thing, you could call up local public psych wards and ask if they would take donations of clothing (think sweatpants without strings, or comfy grippy socks). A child I mentor has frequently end up in the hospital lacking socks, sweatpants, etc, because DHS isn’t always the greatest at making sure things get moved around. (This is why suitcases are usually so in demand - stuff gets moved from placement to placement in trash bags)

They don’t need superheroes - they need to learn that the world has people in it who are kind. I have teenagers that adore me because I gave them quarters to get stickers from a vending machine - it can really be as small as that.