Have a sturdy tree and a few spare pieces of lumber? Throw in a flattened cardboard box, a swath of outdoor fabric, lay down an old picnic blanket and decorate with hedge trimmings woven with bamboo poles.
What do you get after all of that? A homemade yurt (-like) dwelling which makes for super happy kids.
There are no architectural plans to draw up, simply work with what you’ve got.
If you don’t have all the supplies listed above, even something simple as a tarp draped over a strong tree branch will make for happy playing.
Remember it doesn’t need to be fancy, it just needs to exists. Your kids will supply their imaginations to make it a grand affair.
I promise your kids will love helping to erect the structure and thoroughly enjoy playing within it.
As they say, if you build it, they will come.