Whittlins 'n Wood
Cottonwood Bark "Tree Houses"

Two level Tree House.
Two level Tree House.

Two views of a small Tree House.  With a tiny LED inserted in the back, the windows light up for a nice effect.
Two views of a small Tree House. With a tiny LED inserted in the back, the windows light up for a nice effect.

Another two-level, with an outhouse below.
Another two-level, with an outhouse below.

Another small
Another small "Tree House"