wunder betaBiology Classes for Kids
13 free biology classes for kids (Ages 6–12) on Wunder — short, fact-checked courses and lessons with narration and a quiz. Filter by age — each link is its own page, not a JavaScript toggle.
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Comparing Polar Ecosystems
The Arctic and Antarctic look alike but are opposites, an ocean ringed by land and a continent ringed by ocean. Compare their worlds and wildlife.
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Finding the General Rule
Crack the code of any number pattern. Learn to spot the step, build a general rule like 3n + 1, and predict any term you like.
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Ocean Ecosystems
Explore coral reefs, kelp forests, and the open sea to see how ocean living things depend on one another.
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Insects in Ecosystems
Tiny insects do enormous jobs, pollinating flowers, feeding other animals, and recycling waste. See how they hold nature together.
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Building a Simple Circuit
A cell, some wires, and a bulb — join them in a complete loop and the bulb lights up. Learn the parts of a circuit and how to build one that works.
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Words for Ecosystems
Learn the key words scientists use to talk about ecosystems, from habitats and populations to producers, consumers, and decomposers.
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Food Webs and Interdependence
See how food chains weave into food webs, why living things depend on one another, and how removing a single species can ripple through a whole ecosystem.
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Using Classification Keys
Scientists identify living things by asking yes-or-no questions. Learn to follow and build a dichotomous key like a real biologist.
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Co-Evolutionary Arms Races
When predator and prey evolve to outdo each other, nature stages an arms race. Follow poison-versus-antidote newts, speed-chasing cheetahs, and the ultrasonic duel between bats and moths.
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Biodiversity and Keystone Species
Every living thing is part of a giant web. Discover what biodiversity means and meet the keystone species — otters, beavers, and wolves — that hold whole ecosystems together.
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Generating Sequences
Build sequences from rules like 'add 3 each time' or formulas like 3n − 2, and tell whether a sequence is arithmetic, geometric, or neither.
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The Microscopic World
Zoom into a world too small to see: pond monsters, your own cells, unkillable water bears, and the tiniest life of all.
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Ecosystems
Discover how living things and their surroundings work together as one team!
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