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!