Create Your Own "Magical" Self-Inflating Balloon

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  800 Fort Negley Blvd., Nashville, TN 37203

 Open daily from 9 a.m. - 5 p.m. and until 9 p.m. every second Saturday of the month.
Closed on September 9 - 10, Thanksgiving Day, Christmas Eve and Christmas Day

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DIY Science

Rainy day blues? Summertime slump? Cabin fever?

Don’t worry… we’ve got you covered!

Adventure Science Center is proud to offer DIY science lessons and experiments the whole family can enjoy! Each lesson provides instruction, a materials list, and ideas for activities to get hands-on with science, including sample questions to get those gears turning.

MAGICAL SELF-INFLATING BALLOONS by Anna Goolsby, Marketing Assistant

During the cold days of winter, it's easy to get cabin fever. Break up the boredom with this fun, simple science expirement using only a balloon, a measuring tape and a little lung power. With this activity, you and your little scientist can explore the effects of warm and cold air on gases as you watch the balloon *magically* inflate and deflate with the changing temperature!


  • Balloon
  • Measuring Tape (or a bit of string)


Blow up your balloon to a desired size and tie it off at the end. Make note of how big it is by measuring it with either a measuring tape or a bit of string. Take your balloon and put it outside in the cold for a little while in a place you can view from inside for about 10 minutes. Measure your balloon again to see how much it has shrunk and watch as it slowly expands again in the warmth of your home. Try this a few times to see how varying times and temperatures can give you different results!

What's the science behind this *magic*? It's all about volume! As a gas's density increases in cold temperatures, it compresses, causing your balloon to shrink in size. When exposed to heat, the air's density decreases, which reinflates your balloon as the gases expand. 

Further Exploration:

Use the data you collected while expirementing with time and temperatures to answer the questions below. Take it a step further and try this activity on another day to compare results of various temperatures and time frames!

  • How long do you need to leave your balloon outside for it to deflate completely? 
  • How long do you need to keep it inside for it to reinflate to its original size?
Posted by Anna Leigh Goolsby at 5:00 PM
800 Fort Negley Blvd. Nashville, TN 37203
Hours: 9 a.m. - 5 p.m.
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