Why does the Moon look different on different nights?
Keep a Moon log, try a light-and-ball model, and explore changing shapes, daytime sightings, and the repeating cycle.
Explore togetherCuriosity Bundle · Grades 3-5
STEM
Explore the physical world through observations and simple models.
Pick a question to explore together. Find readings, hands-on discoveries, and printable sheets inside.
Astronomy and Space
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Why does the Moon seem to follow you?
Compare nearby and distant sights as you change position. Explore the Moon that seems to come along with you.
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How Can a Small Moon Cover a Huge Sun?
Hide a distant object with a coin and try a safe indoor model. Explore how size, distance, and alignment work together.
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Why Do Shadows Change?
Trace a changing shadow, move a light, and explore shadow clocks and a story about measuring Earth.
Explore togetherLight and Color
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Why Does a Straw Look Broken in Water?
Look at a pencil through water from different places. Explore how light changes the image while the pencil stays straight.
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Why Does a Rainbow Curve?
Explore separated colors and the shape of a rainbow through indoor models and connected reading.
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Why Is the Sky Blue and the Sunset Red?
Notice changing sky colors and try a milk-water model. Explore what light meets on its way to your eyes.
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Why Do Wet Things Look Darker?
Compare a dry patch with a wet one. Explore how clear water can change what a surface looks like.
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Why Am I Upside Down in a Spoon?
Turn a spoon and change your distance. Explore the surprising images made by its two curved sides.
Explore togetherAnimal Superpowers
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How Do Ants Find the Food?
Notice an existing ant trail or try a paper route. Explore messages, shared paths, and what happens when a route changes.
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How Can an Animal Hide in Plain Sight?
Hide paper moths against different backgrounds. Explore when a pattern conceals an animal and when it stands out.
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How Good Is a Dog's Nose?
Try finding familiar scent clues, then explore how dogs gather smells. No pet needed.
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Why Doesn't a Spider Stick to Its Web?
Look closely at a web or paper model. Explore different thread jobs and how its builder moves around.
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How Does a Bat Find Things in the Dark?
Notice sound direction from a safe seated spot. Explore returning echoes and the other senses bats use.
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