Squeeze Bottle Rockets

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Introduction: Squeeze Bottle Rockets

This is a variation on Strawkets I saw at RAFT, and I wanted to see if these would fly as well as the original Strawkets experiment I did with students a while back.

Four 6th grader classes conducted this experiment recently, and the results were conclusive - lung power wins! There's no comparison between lung power and squeeze bottle power. Unfortunately, I didn't take pictures in class, so I took these pictures separately.

Step 1: List of Supplies:

List of Supplies:

  • Straws
  • 2 kinds, one skinnier than the other (they should be able to slide easily inside of one another but not too loose)
  • Facial tissue
  • Index cards
  • Adhesive tape
  • Scissors
  • Squeeze bottle
  • A piece of soft foam to cover the bottle opening

All the materials are easy to find except for the squeeze bottle. I think you can find these at Target or Walmart in the travel container section.

The black piece on top of the squeeze bottle is a squishy foam with a hole in the middle for the straw. If you don't have anything like this, you can just tape over the opening, insert the straw, and tape around the straw to make sure that no air is escaping (except through the straw).

Step 2: Rocket Power Options

Try flying your straw rockets with the inner straw pushed all the way in & pulled out to the bendy neck of the skinnier straw. Experiment and find out which way works better.

Step 3: Rocket Design Options

Take a piece of tissue, twist and fold into an oval shape, and push it into one end of the straw to make it the front end of rocket. Cut pieces of an index card (try to have fun with different shapes and sizes) and attach them at the end of your rocket as tails.

Step 4: Let Them Fly!

These are some of the shapes I experimented with today, but in class, students are VERY creative with sizes (huge to tiny) and shapes (let your creativity soar). Have fun with them.

For more fun projects, please check out Kto6Science blog.

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    2 Discussions

    Sounds like a really fun hands-on experiment to do with kids! So when you used lung power, would you put the straw (the pink one that is sticking out of the bottle) in your mouth with the rocket on it and then just blow?

    1 reply

    Yes. I do have another project called strawkets on instructables. That has the instructions for the lung-powered rocket.