When I was aged around 10 we started regularly doing 10+ mile walks as a family. On holiday in the Lakes or North Wales we'd do a lot of walking, often planning routes which would be remote and away from tourists.
As a naive child I put together a 'survival kit'. This consisted of a small tin/cooking vessel, tiny esbit stove, a few purifying tablets, waterproof matches, a few teabags, Kendal mint cake, whistle, tiny signalling torch, button compass, foil blanket, and survival shelter we could just about all huddle under to keep of rain and wind.
No fishing hooks, saw etc! I only carried the 'survival kit' when we went hillwalking. This was in the days before mobile phones. My thinking was if one of us was injured and the weather turned nasty despite a good forecast, we could rough it out while one of us went to get help. Or maybe the main compass could be lost or damaged.
This would be on top of things carried which would be used- map and compass, plenty of food and drinking water, and things which might be used- first aid kit, penknife, waterproof layers.
It still seems a sensible idea to older me- minimal carefully selected items you never expect to use but are there to make things more comfortable in unforseen circumstances. Comfortable, even if not actual 'survival'.