Everyone has seen these welcome signs outside homes before. I've even seen them double sided to change it for different occasions. 
I found those signs to be limited with creativity. What I designed, was a sign with strong recessed magnets, and decorations with washers on the back. This gives you the option to change the decorations from anything like seasons to the holidays. I have decorations for Halloween (shown), Thanksgiving, Christmas, Winter, Spring, Summer and Fall. I am looking to start making them in a small quantity but I'd like to see if people like the design first.