. "ary action, air, flight, heart and lungs, the digestive system, bones and muscle, senses, light, mirrors, electricity, circuits and electromagnets, magnetism, static electricity, tornadoes, clouds, and water cycle, seeds, fruits and other plant parts, eggs, owls, stars, planets, forces, surface tension, polymers, bubbles, illusions, the human body, germs, astronomy, rainbows, chemistry, famous sci" . . . .