Get a poster board at an office supply store.
They sell this one at Office Depot. I liked that one side is already white so it was ready to be decorated.
Draw lines with pencil where you will cut later. I tried to cut it into the shape of a Polaroid picture frame because I wanted to have space to decorate the bottom.
This frame is for a Holiday French themed party so I wanted to use red, white and blue decorations. I used tape to tape them to the back so they would hang.
Glue any decorations you want to the frame.
I cut bead necklaces to spell out Merry Christmas in French.
Make some props if you want and start having fun at your party!