Kade and Clint pulled out the science kits today and started mixing acids and bases to make a tube overflowing with bubbles. They started to complain about the smell. Then I started to notice it too. After some questioning I discovered they were adding the baking soda and citric acid to previous potions they had made that were left in the tubes for months. And what was the smelly ingredient in the tubes? Milk! YUM! That explained the chunky lumps going over the sides of the tubes with the bubbles. Well they learned about what happens to milk as it ages.
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