Jellyfish in a Bottle

While looking for fun weather experiments to try with Rosie and Jewel I came across this jellyfish in a bottle experiment and thought it would be a simple and fun activity to try.  

Jellyfish in a Bottle
Jellyfish in a Bottle
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Making a Jellyfish in a bottle is so simple and the girls have been loving their new "pet".  

To make a jellyfish in a bottle you will need:
  • A clear empty bottle (we used a water bottle)
  • A clear plastic bag (similar to the ones used for produce at the grocery store- that's what we used)
  • Scissors
  • Blue food coloring
  • Water

Add a small amount of water to the plastic bag and tie it off to create the head of the jellyfish

Jellyfish in a Bottle

Trim the tail down a bit so that the bag will flow nicely through the water in the bottle

Jellyfish in a Bottle

Then cut the tail into lots of tiny strands to create tentacles

Once cut carefully squeeze the jellyfish into the plastic bottle.  Add water and a few drops of blue food coloring if you prefer.  Then watch as your kids marvel at their new, life-like pet!

Jellyfish in a Bottle

As the bottle is flipped upside down and right side up, the jellyfish swims.  It looks so real too!

Jellyfish in a Bottle

The Science Behind the Fun- Questions to Ask:
Given the age of Rosie and Jewel, we did this activity for fun and amusement but for older children there is plenty of science to explore!
  • Why does the jellyfish always float to the top?
  • Can you confuse the jellyfish or trick him in his direction?
  • What causes the jellyfish to float in the water?
  • How is this jellyfish different than a real jellyfish

This Jellyfish in a bottle makes a fantastic discovery bottle.  We added it to our collection and it is already a favorite!

Other discovery bottles we have made:
Click the photos

Discovery Bottles    

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