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    Backyard Science: Season 2

    2x51 How To Make a Hot Air Balloon
    TV-G

    • ABC KIDS
    • 25m
    • Australia
    • English
    In this episode of Backyard Science. We teach you how to build: - A hot air balloon - Learn the salty secret to preserving food - Your own electric motor - Why is the ping pong ball floating?
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