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Halloween is here again, and it is time to mix your Ginsu skills with a bit of old-fashioned Martha Stewart creativity. And it you want to go that extra mile and have the best pumpkin on the block, check out this messy application of basic science.

The oozing jack-o’-lantern. It looks nasty on the outside, but it is nothing but good clean fun. With a few ingredients from your kitchen, you can make some awe inspiring designs that will leave your little trick-or-treaters stunned.

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Or maybe a bit grossed out. Depending on how you apply this concept, the result can be goofy, creepy, or even a bit gross.

Here’s how it works. You’ll need water (half a cup). To that, add some food coloring (20-30 drops). Mix it up and add a bit of dish soap (maybe a tablespoon full). The last ingredient in the about-to-be-oozing ooze is baking soda (two tablespoons full).

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To set it off, just pour in a cup of vinegar. This is similar to what you may have done in grade-school with a model volcano. The moment the vinegar hits the baking soda mixture, it erupts.

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As the video says: “acetic acid in the vinegar reacts with the sodium bicarbonate in the baking soda and forms carbon dioxide gas. This gas is then trapped by the soap, creating bubbles.” The bubbles expand and carry the other bubbles out of the pumpkin.

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using a bit of grade school science. All you need is water, dish soap, baking soda, food coloring, and vinegar. The same ingredients used in a science fair volcano can make your pumpkin appear to puke or ooze disgusting slime from its orifices.

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If you carve your pumpkin face right, the oozing will only add to the creepy Halloween atmosphere. Just be sure you know where the expanding ooze is going to go. It is easier to hose off of your sidewalk on November 1st than it would be to clean up off the kitchen floor.