Cut two 2" circles of contact paper. Select flowers and/or leaves to press on to one of the circles. (The four-leaf clover above was made by adding an extra leaf to a three-leaf clover!) Cover with the second piece of contact paper. Trim.
Spray safety pins with clear coat to keep them from tarnishing.
Use the point of metal nail file to bend open the loop at the base of the safety pin. Use the pin to poke a hole in the top of your nature design. Push it down the front shank of the pin, around the loop and on to the back shank of the pin.