Marshmallow Catapult

Get ready for a hands-on STEM adventure that turns simple craft supplies into a fun engineering challenge! Marshmallow Catapult is a printable Girl Scout activity program that helps kids explore energy, motion, force, and design thinking by building, testing, and improving their own catapult.

This easy-to-run program is designed for leaders who want a low-prep, high-engagement activity that works across multiple Girl Scout levels. Scouts will build a catapult, launch marshmallows, measure results, compare designs, and discover how small changes can affect distance and performance. With Scout as their guide, the activity feels playful, educational, and totally troop-friendly.

What’s Included

• Leader guide with step-by-step instructions
• Program overview
• Girl Scout badge connection page
• Activity choice pages:
• Build Together
• Quick Launch Challenge
• Experiment & Improve
• Group discussion prompts
• Scout handout activity sheets
• Completion certificate

Perfect For

• Girl Scout troops
• STEM meetings
• Maker activities
• Engineering and design challenges
• Mixed-age groups from Daisy through Ambassador

Why You’ll Love It

• Printable and easy to use
• Flexible for short or longer meetings
• Great for group teamwork and independent thinking
• Encourages testing, problem-solving, and creativity
• Fun, memorable, and educational

Bring science to life with a challenge Scouts will love — build it, launch it, measure it, and improve it!