Choose the school year first, then start a level-matched science mission.
Plants, animals, habitats, life cycles, and classification.
Senses, skeletons, teeth, health, and circulation.
Properties, states, changes, mixtures, and solutions.
Magnets, light, sound, electricity, gravity, and motion.
Seasons, rocks, weather, planets, orbits, and shadows.
Fair tests, measurements, observations, data, and conclusions.