What helps?

I think one thing that helps is having a house. A detached house.
. . . .
It's not a requirement, but it seems to help. Then kids have dirt to dig in. I know some apartments have dirt and some houses don't. But still. Dirt. Bugs. Plants.

There is more of that, and more about what else helps, in a chat transcript:
SandraDodd.com/chats/whathelps
photo by Lydia Koltai