Vinyl is the cure for anything isn't it? at least in my house it is :)
This was super fast and easy to do!
and it looks WAY less tacky than those black plastic signs you buy at home depot!
I just measured my window, cut the vinyl on my cricut and stuck it to the outside!
If you don't have the entryway windows, you can do it on the bottom corner or the window closest to your front door, or even directly on your front door!