It doesn't take much. It really doesn't.
Build some freedom into your day for time to play outside and you've got a recipe for happiness.
Add a friend or two, and the fun likely increases.
Add some gentle, guided learning experiences and sometimes the joy of outside play shadows any real awareness that learning is happening.
Movement and creativity. Nature and imagination. These are the best ways to learn. And, this being said from Ms. Read-a-Book-a-Week-if-You-Can.
But all of the time it's with God's creation stamp on it.