Hula-Hoop Observation

Be backyard scientist. Use a Hula-Hoop to isolate an area to observe. And if you don't have a hoop, make one! Scroll down for step-by-step instructions.
Be backyard scientist. Use a Hula-Hoop to isolate an area to observe. And if you don't have a hoop, make one! Scroll down for step-by-step instructions.

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