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.
Perhaps one of the greatest whimsy mashups. Alice in Wonderland, illustrated by Tove Jansson! Tove Jansson’s Rare Vintage Illustrations for Alice in Wonderland