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The leak-proof bag experiment is a fun science experiment in which your kids get to poke pencils right through a plastic baggy filled with water. Amazingly, the water doesn’t come pouring out! This is a quick and easy experiment to set up too.

The leak proof bag is a high interest activity to introduce your children to polymers, specifically a polymer called low-density polyethylene (LDPE). And if you don’t care to get into the nitty gritty of the science, it just makes for a really fun experience.

Who would have thought that a plastic bag, some water, and a few pencils would have kids everywhere scratching their heads in amazement? Learn how to poke holes in a plastic bag filled

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