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    Skeleton Cave

    Year 3 Skeletons & Muscles

    Learn how skeletons support and protect bodies, and how muscles pull on bones to make us move.

    • Ages 7–9
    • 3 quests
    • Beginner → Getting stronger → Challenge

    Humans and many animals have a skeleton made of bones. The skeleton holds the body up, protects important organs like the brain and heart, and works with muscles so we can move.

    What your child will learn

    • Know the three jobs of the skeleton: support, protection and movement
    • Name some bones, such as the skull, ribs and spine
    • Explain that muscles pull on bones to make them move
    • Compare animals with internal skeletons, exoskeletons and no skeleton

    Muscles work in pairs

    Muscles can only pull, not push. To bend your arm, the muscle at the front (biceps) gets shorter and pulls. To straighten it, the muscle at the back (triceps) pulls instead. Joints like knees and elbows are where bones meet so they can bend.

    Example questions

    Here are a few questions like the ones in the first quest. Can you solve them?

    1. 1. Which bone protects your brain?

      💀
      • The knee
      • The ribs
      • The skull
      • The spine
      Show answer

      Answer: The skull. Your skull is like a helmet for your brain.

    2. 2. True or false? Your skeleton helps you stand up.

      Show answer

      Answer: True. Without a skeleton, you would flop like jelly!

    3. 3. Which animal has no bones?

      • A bird
      • A fish
      • A worm
      • A dog
      Show answer

      Answer: A worm. Worms have no skeleton at all.

    Tips for grown-ups

    • Feel the muscle in your upper arm as you bend and straighten it.
    • Find your joints: how many can you bend?
    • Drink milk and eat cheese or yoghurt for strong bones.