At one craft show at a senior's center (years ago), they had butterfly pins that were made from greeting cards. There would be 2 cards the same...the butterfly would be cut out of both of them...one would be laid flat and the top one would be folded up a little bit on the wings to give a 3D effect. They would be glued together at the "body" section of the butterfly with a pin on the back of them. They were sprayed with a shiny gloss also. Loved the way they looked and bought several of them for the summer.
Another fun thing was a mini clay pot (about 3") that was decorated for different seasons with starts of different plants. Some seniors have a green thumb and love to share their talents.
Of course Christmas ornaments are always a hit since they can save them for themselves or for gifts too.
Have fun