How to Build a Simple Small Marshmallow Catapult

To change things up from my regular posts, I decided to write instructions on how to make a simple catapult. I’m a Den Leader for my local Webelos cub scouts group and we are working on the engineering activity badge. One of the requirements of the activity badge is to built a catapult. This catapult can be used as a craft idea for kids on a slow weekend or it can be used as a school project.

When finished, I found that the best items to launch from this type of catapult was mini marshmallows commonly found for a few dollars at a grocery store.

I chose a simple design that would be easy for the boys to follow and would allow plenty of time to launch marshmallows at a target. Many designs (including the one provided in the scout handbook) were fairly complex and would require a long time to built. Some I saw were just as big as the scouts themselves. After following these instructions, it only took the scouts about 10 minutes to complete everything and start participating in trying out their new catapult.

If you’d like to print these instructions, download this PDF.


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  • 9 craft sticks. Popsicle sticks may work, but wider sticks are much better. They can be found online at amazon or at your local craft store (I found some at Michaels for around $10)
  • 4-6 rubber bands
  • 1 plastic spoon



Step 1 – Take 7 of the craft sticks and tie a rubber band tightly around one end.

Craft sticks


Step 2 – Tie another rubber band tightly around the opposite end so all 7 sticks are bound together.

Craft Sticks Step 2


Step 3 – Take the remaining 2 sticks and tie a rubber band on one of the ends. Try to tie the band close to the edge of the sticks.

Craft Sticks Step 3


Step 4 – Insert the 7 sticks banded together through the 2 stick bundle as shown in the illustration below.

Craft Sticks Step 4


Step 5 – Tie a rubber band in a cross fashion joining the two pieces. The closer the 7 stick bundle gets to the edge, the more leverage the catapult will have.

Craft Sticks Step 5


Step 6 – Use a few rubber bands and attach the plastic spoon on the end.

Mini Marshmallow Catapult

If these instructions helped you in anyway, please leave me a comment or link to this page so others can find these instructions as well.

91 thoughts on “How to Build a Simple Small Marshmallow Catapult

  1. this is cool im sorry for telling u the wrong thing before it rocks u rock man thank u for the great ideahs kkep up the great work

  2. Hi I am sooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo pleased with my catapult it is amazing!!!!!!!!!!

  3. Thank you so much for this! I am using it for my cub scouts this afternoon. It was simple and fun to make and it works really well.

  4. Excellent idea and easy to make.
    The only issue I had was that they tended to shoot straight up. I fixed this by taping the whole contraption to the side of a cup.
    Kids had a blast!

  5. Thank you! You just gave me an idea in making my catapult.
    Although we are required to make it using barbecue sticks instead of Popsicle sticks, still you gave me a nice idea on how to make it.

    Again, Thank you very much!!! ;3

  6. Thank you for posting this idea! I really appreciate it when people post their great ideas and share! We are doing a science group this year and this is perfect- we’ll have to coordinate it with the engineering merit badge as well- great idea!

  7. I found this project via pinterest, and we will be making this for a craft at my son’s 7th birthday party (vikings and dragons!). I know this will be a huge hit!!

  8. Minimal required items and inexpensive too. Super idea and so glad to have found this link! Husband is headed to a ranch with over 100 kids and this will be perfect for his group’s project. Thank you.

  9. Awesome and Simple.
    I may post a video in how they work.
    Thanks for the awesome web page on this!

    I also plan to make 2 or 3 different wedges to help my kids learn to shoot farther or less far.

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