Fishing with a rod, hook and worm is free everywhere in Finland (and is more boring and even yacky for some than for their daughters… lucky there are grandparents who are only happy to suffer)
Picking forest berries “Pippi style” or in a basket.
Making flower garlands.
Nature puzzles; exciting for an almost 3 year old to know who has been dining here.
Building sand castles.
Yes, old (summerhouse) goodies that together with dolphin and crocodile games in the sea are good fun when done together.