[ She is glad he asked! ] First aid, for example. Some worlds might not have the kind of medical technology we have available in the first aid kits. Someone might not know what antiseptic spray is, for example. I bet there's a lot of people who use the beach and don't know how to administer help in the case of someone who experiences muscle cramps and can't swim. Or how to stabilize sprained joints.
[ Subaru started talking excitedly there, but she calms herself. ] I think I lost focus there, but you get the idea, right?