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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 expleak proof bag experimenterience.

Find out why you can put a pencil through a bag of water with this easy-to-set-up leakproof bag experiment. Can you pull it off without getting soaked? Did we? We love easy and fun science experiments for kids!

How do You Make a Leak-Proof Bag? Fill a plastic Ziplock bag about 3/4 full with water. Stick a few sharp skewers through the bag one by one. Watch in amazement as your punctured bag does not leak! Slowly pull the skewers or pencils out of the bag to see what happens!

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