Creative, organ-themed pins to take your outfit or bag to the next level. From a heart to a brain, these pins are fun and unique - great as a gift for children, which they can put on their school bag. All the pieces available are constructed using zinc alloy. They have careful details - from veins on the eye pin to tooth contours in the tooth pin. Some pins available are colored, but the colors won't draw too much attention or overpower your outfit. Simply push the pin through a shirt, jacket, bag or hat, then secure by placing the butterfly closure onto the pin. The underside of each pin is black. Extremely lightweight, weighing only 3-4 grams, they won't weigh your clothing down.