Dog House
This dog house is in the backyard.
The dog house has a roof.
Dog food is in the bowl.
Wading Pool
These children are playing in the wading pool.
Water is in the pool.
The wading pool is in the backyard.
Treehouse
A treehouse is a small house built in a tree.
Children climb up a ladder to enter the treehouse.
This treehouse has a roof, a door, and a window.