The photos and postcards are fascinating. Today that would not be tolerated as you can see that some children are " Armed with long sticks" and the Cub in the first picture almost certainly was carrying a clasp knife, as would most of the other boys. Also non supervision so close to open water and children playing alone without Police protection, never do, far too dangerous. Also the model boats were constructed from wood, could be sharp splinters, no one is wearing safety goggles or gloves and that steam boiler looks home built, Test certificate? Maybe everyone had more common sense in those days.