Build Your DIY Cardboard Boat Step by Step | Elmer's Build It Tools Tutorial

Set sail for a new adventure by building a cardboard boat from the shore up! Easily create a simple cardboard boat design with this step-by-step tutorial that's sure to make your DIY cardboard boat the pearl of the ocean.

Dive into the possibilities of imagination with a DIY cardboard boat using Elmer's Build It Tools and create the best cardboard boat to brave the 7 seas!

Cardboard Boat Instructional



  • Cardboard Boxes

Elmer's Build It Tools Starter Set:

  • Holepunch & Screwdriver

  • Kid-Safe Cardboard Cutting Tool

  • Screws

  • Flat Brackets

  • 90° Brackets

Elmer's Build It Tools Expansion Set:

  • 3D Corner Bracket



  1. Gather your cardboard boxes, Holepunch & Screwdriver, Kid-Safe Cardboard Cutting Tool, Screws, and Brackets.

  2. Using your Cardboard Cutting Tool, open and flatten 4 cardboard boxes. Cut out the top corners of 1 box to create a pointed tip. Also cut out 1 isosceles triangle, and 1 rectangle, as pictured.

  3. Place the pointed cardboard boat piece in the middle. This will be your boat BOTTOM. Take 2 flattened cardboard pieces and curve around each side of the BOTTOM, then attach pieces with 4 Screws on each side.

  4. Take your remaining flattened box and curve it around the back of your boat, then attach to the side cardboard pieces with 2 Flat Brackets and Screws. Screw the back box to the bottom box to make a cardboard boat base.

  5. Use a 3D Corner Bracket to connect the front pieces to the base, and use a 90˚ Bracket to connect the top of the front cardboard pieces, if extra support is needed. Use Screws to connect the triangle cardboard cutout to the rectangle cutout and insert into small cardboard box base to make the boat's sail.

  6. Time to steer your new DIY cardboard boat!



Elmer's Build It Tools turn your child's imagination into real-life cardboard cutout creations. Our kid-safe cardboard cutting and connecting supplies safely and easily create cardboard crafts for kids ages 6+. Ensure safety even when tools aren't in use with the additional security of the snap-on protective sleeve for our Kid-Safe Cardboard Cutting Tool.


*Adult supervision required.


Click here to download a PDF of all Elmer's Build It Project Instructions.