Cut denim scraps into 4-inch pieces, smaller pieces for flower centers. Paint each piece of denim the color you want your flower to be. Paint the smaller pieces the color you want your center to be. Allow the pieces to dry.
Meanwhile, paint the wooden clothespins green and allow them to dry. Hot glue a round magnet to the back of each clothespin toward the top.
Use scissors to cut flower shapes from the painted denim. Hot glue the flowers to the front of the clothespins; this will hide the magnets in the back.
Hang on the refrigerator to display your artwork and class papers!