Puddles
When my boys were young they couldn’t pass a puddle without jumping in, even with my warnings the temptation was alway too great. Now as they are older they have moved on to throwing stones in, and watching the ripples. If I give them any length of time they will float a stick or make a leaf boat. A river or lake is there purely for stone skipping. I love that they are so easily amused, long may it last!