I recently hosted a retirement party for my mother. I had fun planning the food and creating some simple decor. Here is a free printable from that party for a mini cake sign.
Download the file here. Then simply print, and cut along the exterior lines. Score on the red edges at the top. Fold over the white edges and glue/tape onto string, ribbon, thread, whatever you have. Then tie them to two wooden skewers (I did put some glue on the knots to hold them in place on the skewer.) and ta-da!