States of matter
Change temperature and watch the same particles form a solid, flow as a liquid or spread as a gas. Compare water and iron.
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Nature, technology, the body and the world for grades 1–4 — observe, experiment, understand
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Simple electric circuits
Open and close a circuit to light a bulb. Compare series and parallel connections and see why a complete return path is necessary.
Elementary · Science & SocietyTry it
Pinhole Camera & Solar Eclipse
A summer evening with a street, houses and trees: a tripod holds a piece of cardboard with a small hole up into the low sun — and an image of the Sun appears on the paper on the ground. During the partial solar eclipse the light spot becomes a crescent: upside down, and no matter whether the hole is round or square — only a big hole turns the spot hole-shaped. While playing the eclipse, sky and surroundings visibly darken, stars come out, shadows fade. With leaf-canopy mode (many holes = many mini crescents) and the important reminder: never look directly at the Sun.
Elementary · Science & SocietyTry it
The water cycle
Follow evaporation, condensation, precipitation and runoff in a closed cycle driven by the sun. Explore four stations without creating or consuming water.
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