prov:value
| - lectricity, 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 scientists and their experiments, adventure science and printed curricula sold as a unit therewith
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