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OR PERHAPS you fancy crunching up snail shells before fizzing them to nothingness with vinegar? These are just two of the charming tricks your kids will learn if Santa leaves them a “gross-out” science package.

Artificial vomit features in the Horrible Science Experiments Pack by Nick Arnold and Tony De Saulles. This is not a book but a pack of cards with instructions for home-based experiments bundled up with a pair of good, strong magnets and some balloons. While the package desperately needs improvement, the horrible experiments have their educational value. Not all the experiments are gross. There’s a recipe…

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