pool noodle periscope

Things are looking up! Making this pool noodle periscope is an awesome educational summertime activity.

Things are looking up! Making this pool noodle periscope is an awesome educational summertime activity.

pool noodle periscope

Discover a new point-of-view on the world with this creative and resourceful poolside project. A pool noodle is a cylindrical piece of buoyant polyethylene foam. You’re going to need a hollow one. Take that pool noodle, a few things you probably have stuffed in the junk drawer, and put it all together to build this toy while learning a bit about geometric angles and the properties of reflection.

You ARE the submarine!

Here’s What You Need

  • Duct tape
  • Marker
  • Mirrors
  • Pool Noodle
  • Protractor
  • Tape Measure
  • Utility Knife


Here’s What You Do

  • With your tape measure and marker, measure four inches from one end of your pool noodle and mark it with a dot.
  • Make another mark two inches above it (six inches from the end).
  • Using a protractor, mark a 45-degree angle using the dots as your beginning and end cut points.
  • With help from an adult, cut the noodle on that 45 degree angle.
  • Take the piece you just cut, turn it around and connect it back to the main branch of the periscope at a 90-degree angle. Feel free to adjust
  • your cuts to make sure it makes a perfect 90-degree angle.
  • Insert your mirror inside the noodle so that it connects at the joint. The periscope works best when the mirror is slightly smaller than the pool
  • noodle’s circumference.
  • Tape your corner together.
  • Making sure to reverse your cuts, repeat the first four steps on the other end of the pool noodle
  • One side should look like an L and the other should look like a backwards L.

If you’re having trouble seeing through the periscope, adjust your mirror’s positions and make sure the reattached ends are at exactly 90 degrees.