Squirrels make two types of homes over the course of the year. Wouldn't it be nice to have a summer and winter home?
In the winter they make a den. Using a cavity made by another animal such as a bird. This is where they spend the winter and may have a food stash.
Summer homes are called a drey and is made of sticks and leaves at the intersection of two large branches. They usually have two doors. Can you make one?