Dr. Bob showed me this in a workshop this summer. You gather different types of seeds and place them on packing tape, sticky side up. Then you place a second strip over the top and label with the appropriate names. This is such an easy way to show children seeds without them falling all over the place. It also helps to show the differences. These are Tomato, Pumpkin, Cantaloupe and Sunflower. The tape makes a glare when photographed.