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Active Time
30-45 minutes
Total Project Time
30-45 minutes
Key Concepts
Surface tension, water
Large bubbles float in the air


Have you ever tried to blow a bubble, and no matter how hard you try, the bubble just will not form? Why does this happen? Why do bubbles form at all, and why is it harder to blow bubbles sometimes? In this activity, we will explore the limits of how big our bubbles can get!


Megan Arnett, PhD, Science Buddies
Sabine De Brabandere, PhD, Science Buddies
This activity is not appropriate for use as a science fair project. Good science fair projects have a stronger focus on controlling variables, taking accurate measurements, and analyzing data. To find a science fair project that is just right for you, browse our library of over 1,200 Science Fair Project Ideas or use the Topic Selection Wizard to get a personalized project recommendation.


  • Two dowel rods (at least ½" diameter works best.)
  • Two screw eyes (a closed loop with a threaded base) that can screw onto the dowel rods
  • Yarn or baker's twine (at least 18 feet or 6 meters)
  • A washer
  • Bubble solution (Optional make-your-own bubble solution ingredients are listed below.)
  • A bucket or large container to hold bubble solution
  • Outdoor area with space to run!
  • An adult helper
  • One or two measuring tapes (a total length of at least 3 meters)
  • Scissors
Bubble Solution (Makes approximately 1/2 gallon.)
  • Eight cups of water (1/2 gallon or about 2 liters)
  • Half cup of liquid dish soap (blue Dawn works well.)
  • One tablespoon glycerin
  • One tablespoon baking powder


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Active Time
30-45 minutes
Total Project Time
30-45 minutes
Key Concepts
Surface tension, water
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