Moomin by Tove Jansson. “Lie on the bridge and watch the water flowing past. Or run, or wade through the swamp in your red boots. Or roll yourself up and listen to the rain falling on the roof. It’s very easy to enjoy yourself.
Do you know the Moomin characters? I stumbled on these books by Swedish author Tove Jansson one summer when I was young and have loved them ever since!