Giant
7 foot long balloon bags. Demonstrate the amazing properties of air with these
mega cool bags. How many breaths does it take to inflate one of these 2 meter
long monsters? 100 breaths, or more, maybe? With a little practice and science
know how you can learn to blow these balloons in just one breath! Don’t believe
it? Then you’ll just have to try this remarkable science activity for yourself.
And once you’re done experimenting have fun bouncing and sailing the inflated
bags though the air. You can even smack your friends with ‘em because they don’t
hurt!
Ages:
6
+
What
you get
3
balloon bags (7 foot long) – select from three designs above (monkey, dinosaur or
pirate).
How
does it work?
Balloon
Bags are actually long plastic bags in the shape of a tube. They are very thin
and very light. Have a friend blow up the bag and keep track of the number of
breaths it takes. Then show them how it is done, with just one breath! Have
someone hold the tied (or closed) end of the bag, hold the open end of the bag
about 20cm away from your mouth, and then blow as hard as you can using only one
breath. Quickly seal the bag with your hand so the air doesn’t escape, and tie a
knot at the end of the bag, or let the air out and try
again.
The
bag quickly inflates because of Bernoulli’s principle. Basically, air from the
atmosphere is drawn into the bag from the sides along with the fast moving air
from your lungs. For the science enthusiasts out there, plenty more info is
available online.
Teachers
can also use these bags to demonstrate principles of aerodynamics. Does changing
the size of the bag effect how far they can be thrown?
Teach
- Principles
of air and aerodynamics.
- Bernoulli’s
principle.
- Air
pressure.
FAQ
These
balloon bags are made of thin plastic in order to work properly, thus small
holes or tears can develop. These can be easily repaired using sticky tape or
the like.
WARNING: CHOKING HAZARD – Small Parts. Not
for children under 3 years.
