For this activity, you’ll need some paper and a pencil (and some colours, if you’d like)
Draw a window - possibly a rectangle, but any shape of window you like.
Draw what you can see through this window, from inside - this can be imaginary, or what you really can see through the nearest window.
Now draw the same window, but from the outside, and draw what you can see looking in.
In the example shown here, I have drawn the figure of a child enjoying herself up a tree outside, and reading on the sofa inside. I have used a simple black pen, but you could colour your window pictures, or use paint or pastels.