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An Easy Triangle Craft for Preschoolers that uses Cardboard

This triangle craft for preschoolers is so easy! You can mix and match colors to help teach about the color wheel. Decorate them for Christmas trees. Or just hang them in your classroom! Plus they use cardboard, so it’s a great recycling project too!

Triangle Craft for Preschoolers

You can’t get much easier than this simple triangle cardboard craft. Use this simple shapes craft to teach preschoolers about basic shapes, like triangles!

Cardboard triangles painted in secondary colors. Text reads: "Easy Triangle Craft"

Sometimes the most simple craft is all you need.

This easy triangle craft is perfect for in the classroom. Learning about geometric shapes is an important skill for preschool kids to master. And using shape crafts is a great way to teach while playing.

Grab some cardboard to create the shape. Then paint them with secondary colors or decorate them as a Christmas tree.

You can use this easy cardboard craft in several ways.

  • Hang them in your playroom or classroom.
  • Glue them to the front of a handmade holiday card.
  • Display them on your classroom bulletin board.
  • Mix various colors on them to learn about color mixing!
  • T is for triangle! This craft idea is perfect for letter “T” crafts.
  • Use a glue stick to attach googly eyes and create a shape monster!
  • Triangles make excellent ice cream cones! Add circles to the tops and you have a fun summer craft.
  • Paint a green triangle and turn it into a Christmas tree!
  • Talk about the number of sides on their triangles for a fun math activity.

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Our Favorite Craft Supplies.

These craft supplies are perfect for crafting with young kids. While not each of them is used in the craft below, they are all staples in our craft bin. If you don’t have any on hand, that might be ok. Take a look at the craft first to see whether or not you need them.

  • Construction Paper – One of our favorite craft supplies. These crafts are a great way to use up that stash of black paper.
  • Pipe Cleaners – This versatile craft supply holds its shape so it’s fun to play with afterward.
  • Craft Sticks or popsicle sticks – A classic staple, use them in your craft or to mix paint.
  • Kid-Friendly paint – Kids love to get messy! Check out our favorite tips for painting with young children.
  • Googly Eyes – You can literally add them to any project and it instantly becomes cuter.
  • Tissue Paper – We always have this on hand. Buy it new or use or save it from birthday parties and holidays.
  • Toilet Paper/Paper Towel Rolls – A great way to recycle your paper tubes is to use them in crafts!
  • Paper Plate – Grab this party supply to create fun crafts.
  • Contact Paper – We use this a lot to create suncatcher crafts
  • Pom Poms – These fuzzy balls can be used in so many crafts!

No time to make this secondary colors art? Pin it for later!

If you’re currently in planning mode, that’s ok! Pin this to your favorite Pinterest board. That way you’ll be able to grab instructions when you’re ready!

Cardboard triangles painted in secondary colors. Text reads: "Preschool Craft - Triangles"

Tips for creating this triangle craft:

These triangles are very simple. But here are some tips to help you along the way.

  • We chose secondary colors. But you can let your kids experiment with colors.
  • Try creating them using different shapes.
  • Let them play with the different sizes too! They can have a red small triangle, a brown large triangle, and a green small circle!
  • Younger children may need help cutting the cardboard. You can cut the triangles ahead of time
  • Use a piece of painter’s tape to create a loop on the backside of your paint pallet. This holds it in place and is really helpful to younger painters.
In process image of a cardboard triangle craft for preschoolers.
Yield: 1 Set

Torn Cardboard Secondary Color Triangle Craft

Cardboard triangles painted in secondary colors.

Work on pincher strength, talk about secondary colors, and the triangle shape all in one fun craft! Check out a fun way to make it seasonal at the end!

Prep Time 5 minutes
Active Time 15 minutes
Additional Time 10 minutes
Total Time 30 minutes
Difficulty Easy


  • Cardboard
  • Paint - Secondary Colors - Purple Orange Green
  • Decoration Materials - Optional for Seasonal Twist


  • Scissors
  • Paintbrushes
  • Pallet
  • Painters Tap


  1. Cut your cardboard into triangle shapes. This may need to be done ahead depending on the age of the crafter.In process image of a cardboard triangle craft for preschoolers.
  2. Using the back end of the paintbrush, puncture the cardboard and slip the brush under the top layer.In process image of a cardboard triangle craft for preschoolers.
  3. Pinch and peel off the top layer of the cardboard exposing the inner binding.In process image of a cardboard triangle craft for preschoolers.
  4. You can also pull off along the edges.In process image of a cardboard triangle craft for preschoolers.
  5. Repeat on 3 separate cardboard triangles leaving some of the top layer in place.In process image of a cardboard triangle craft for preschoolers.
  6. Start painting in the solid spaces with one of your secondary colors.In process image of a cardboard triangle craft for preschoolers.
  7. Then, using a smaller brush, paint the lines left behind where the top layer was removed.In process image of a cardboard triangle craft for preschoolers.
  8. Paint a second coat on the solid areas if needed.In process image of a cardboard triangle craft for preschoolers.
  9. These completed projects can be used to talk about shape and color!Cardboard triangles painted in secondary colors.
  10. BONUS IDEA: Give your green triangles a Christmas twist by decorating them with anything you have lying around. Paper, glitter glue, rhinestones, etc.Cardboard Christmas trees.

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Cardboard triangles painted in secondary colors. Text reads: "Cardboard Triangles"
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