Nanogirl's Witches' Brew Halloween Experiment

Double, double, toil and trouble—fire burn, and cauldron bubble. Experiment with our Nanogirl Witches’ Brew this Halloween!

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Nanogirl's Witches' Brew Halloween Experiment

Double, double, toil and trouble—fire burn, and cauldron bubble. Experiment with our Nanogirl Witches’ Brew this Halloween!

Make a harmonica

Try this simple experiment at home to make your own noisy harmonica using the science of vibration.

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