Flying marshmallows: DIY marshmallow shooter

Children have a natural curiosity. That’s one of the reasons why they are so attracted to science activities (even though they don’t usually know it’s science!).

This particular activity will feel like a game, but it is actually a great way to introduce your child to hands-on science, building things themselves, and experimenting. So, let’s get started!

DIY Marshmallow Shooter

DIY marshmallow launcher


  • Plastic, disposable cups
  • Balloons
  • Mini marshmallows
  • Scissors
  • Rubber bands


Tie a knot in your balloon.

DIY marshmallow launcher

Snip off the rounded part of the balloon, leaving plenty of the balloon attached to the knotted end.

DIY marshmallow launcher

Carefully cut the end off the cup. This can be tricky – probably best for an adult to do this part!

DIY marshmallow launcher

Stretch the balloon over the lid of the cup and secure with a rubber band.

DIY marshmallow launcher

Load one of your mini-marshmallows into the launcher. Try to let it rest right in the area created by the knot of the balloon for best results.

DIY marshmallow launcher

Pull back the knot of the balloon and launch your marshmallow!

DIY marshmallow launcher

You don’t need to pull hard – they fly pretty well on their own! A simple tug is all you need.

Be sure your launcher is not pointed at anyone, either. While marshmallows seem soft, they can still be dangerous if launched forcefully from the launcher!

Try setting up targets to experiment with shooting distance and accuracy, or set up a little competition to see who has the best aim at your targets!

Thank you to GoldieBlox for permission to repurpose their marshmallow shooter idea on our blog!

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