Although cleaning the windows is Not fun to do, playing fast food through the windows IS fun to do.
We used to take out the window screen in our home in Texas all the time. The front window was the perfect height for a three year old to pass things in and out. Our kids would make smoothies, lemonade, or cups of water and take turns handing them out to their neighborhood friends. It was very entertaining.
When I decided to clean the windows (and the screens) J asked if he could make our lunches portable and 'sell' it to us. Sure! He took each of our orders ahead of time and customized our sides & drinks. After they were made, we took turns visiting the window.
M helped with the cleaning. We used almost half a bottle of Windex because the windows were that filthy. Eww.