Blast Off

Use air power to send a straw rocket flying high. Whoooosh!

  • Target Age: 6-10
  • Skills/Subjects: Science
  • Related Episode: Episode 520: The FETCH! Finale


1. Get what you need:

  • empty 20 oz. plastic bottle
  • thin straw
  • wide straw (that fits over the thin straw)
  • clay or poster putty
  • tape
  • scissors
  • construction paper (optional)
  • string (optional)
  • paper streamers (optional)

2. Build a rocket launcherRocket launcher

  • Hold a thin straw about an inch down into the mouth of the bottle.
  • Wrap a ball of clay about the size of a quarter around the bottle opening, sealing it tightly around the straw and the bottle so no air can escape.
  • Now squeeze the bottle. Do you feel air coming out of the top of the straw?

3. Build a rocket. Seal up one end of a wide straw with a small ball of clay. Place the open end of the straw over the thinner straw in the rocket launcher.

4. Blast off! Wrap both hands around the bottle and squeeze sharply. Your rocket should fly through the air. If the rocket doesn't launch, practice squeezing the bottle harder and check that there are no holes in the clay.

5. Design more rockets.Make different rockets by attaching wings and tails to other wide straws. Use construction paper, string, or bits of streamers. Test the rockets. Which ones flew the farthest? Did any curve in the air? How did your additions change the way they flew?

Safety Tip
Always point your rocket away from people before launching it.


When you squeeze the plastic bottle, the air inside the bottle pushes through both straws. Since the top of the wide straw is plugged up, the air has no place to go, so the air pressure launches the straw into the air.


  • Take it outside. Make wings or tails for your rockets from leaves, grass, or other materials found in nature.
  • Balloon racer. Can you get a balloon to shoot across a room on a zip line? Get a straw, some string, tape, and a balloon. Thread the string through the straw and ask two friends to hold each end of the string. Blow up the balloon and hold it closed. Tape the balloon to the straw. Release the balloon and see what happens!


Every year, thousands of kids in grades 7-12 compete in the Team America Rocketry Challenge (TARC). They build rockets that can fly over 800 feet carrying one delicate passenger—an egg—that must land uncracked. Winners receive prizes, including an advanced rocketry course from NASA. Visit www.rocketcontest.org to find out more.

Download a printable version of this activity:

*Adobe Reader required for PDFs

Dinosaur Train A to Z


Find more activities featuring your child’s favorite PBS KIDS character!