How to build a styrofoam sailboat

Written by addie kaye
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How to build a styrofoam sailboat
Make a sailboat out of styrofoam. (toy sailboat image by Kimberly Reinick from

Build a model styrofoam sailboat with children as a summer-themed arts and crafts project. Because styrofoam floats above water, children can play with the sailboat after construction inside a bathtub or swimming pool. You can build homemade styrofoam boats at a children's pool party and hold sailboat races inside the swimming pool. Teachers can build styrofoam sailboats with their students to teach them about flotation.

Skill level:

Things you need

  • 2 styrofoam bowls
  • Permanent markers
  • Drinking straws
  • Hot glue gun
  • Scissors
  • Razor Blade

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  1. 1

    Choose a styrofoam bowl that will act as the sailboat's base. Give the sailboat a name and write the name on the outside of the bowl using a waterproof permanent marker. Continue using permanent markers to draw decorations onto the remainder of outside of the bowl and into the inside of the bowl.

  2. 2

    Draw a triangle onto the bottom of the second styrofoam bowl. Cut out the triangle using a scissor or razor blade to create the boat's sail. Colour the triangle using permanent markers.

  3. 3

    Cut off the bendable top from a drinking straw. Position the triangle against the side of the straw, near the top. Use a hot glue gun or other waterproof craft glue to glue the straw to the triangle. Glue the bottom of the straw to the middle of the styrofoam base.

Tips and warnings

  • Cut out rectangles from the leftover styrofoam and draw a miniature person on each one. Place the little people inside the boat to encourage creative play amongst children.

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