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起始时间 01:07Building the Catapult Arm

Young Engineers: Pyramid Catapult - Easy and Powerful DIY STEM Project f…

YouTubeSTEM Inventions

起始时间 0:00Introduction and Materials Needed

How to Make a Simple Catapult for Kids

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起始时间 03:02How to Use Your Catapult

Science Max | How to Make a Mini Catapult

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起始时间 00:30Building the Base of the Catapult

Young Engineers: Class 1 Catapult - Easy and Fun DIY STEM Project for Kids

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起始时间 04:07Mini Catapult Project

Popsicle Stick Catapults - Simple Machines │Educational Video for Chil…

YouTubeNow What? With Britt & Shawn

起始时间 02:22History of Catapults

Learn How To Make An Easy Catapult - Kids Science Experiments

YouTubeChampak World

起始时间 06:31Preparing the Catapult Arm

Making catapults, a great project for kids and adults

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起始时间 01:04Catapults History

Catapult - Introduction