Educational/wholesome entertainment resources for children/young adults

I'm making a list of educational/wholesome entertainment resources for children/young adults (e.g math/logic puzzles, knots, intro programming projects, Sherlock Holmes stories, LotR, growing avacado trees from seed, ant farms, youtube video on building a home, stoic philosophy, how to play the piano, etc).

Do you have anything interesting to add that you really enjoyed?

Thanks