When you think backyard, you think playing, relaxing and grilling, right? But this summer, think “testing hypotheses” too. We couldn’t think of a better area than your spacious, self-cleaning (thanks, rain!) yard to set up experiments all summer long. Flip through to find one to try!

A Clean Sweep

If you’ve ever wondered how elephants keep their tusks clean, we’ve got the answer. They use elephant toothpaste! Find out how to mix your own and figure out the science behind this dynamic reaction from Asia Citro at Fun at Home With Kids. Our favorite part? That you get to throw in some sensory playtime after the action’s over.

photo: Fun at Home With Kids

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Which one of these experiments looks fun to you? Leave your pick in a comment below. 

—Allison Sutcliffe