The most creative safe in the world: a lock with a magnet!

How To Make Rotatable Storage Shelves

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How powerful can it be to propel a car with carbon dioxide? Plus a crash simulation experiment!

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Homemade Magical Piggy Bank! Mom don't have to worry about me saving money anymore

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Don't throw away the waste paper box, make a candy vending machine, the feeling of self-help is good

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"Hot glue wheels, boy"

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I set fire to my house...

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[DIY] Advanced Coin Sorting Machine

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The ultimate mechanical short legs!

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Handmade|Environmentally Friendly Rolling Calendar

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Don't throw away the crab shells after eating, add some parts, the straight man of steel is crying

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Cyber bike

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What would be the effect of removing the iron branch in the bicycle tire and replacing it with a sho

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new ship equipment

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Two-wheel-drive bike, hand-assembled!

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How long will the refrigerator last?

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Build a rubber band machine gun out of corrugated paper and hold up to 120 rubber bands!

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A V8 powered by an electric screwdriver! Fully handcrafted model with gas pedal!

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Homemade magnetic Rubik's cube, if you can't solve it, take it apart

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Stacy and dad play fun games outdoor

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Children's educational handmade building blocks track toy rainbow pipe ball game

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