YouTube on MSN13 天
How to Make a Powerful Miniature Cannon - DIY Guide
How to Make a Powerful Miniature Cannon - DIY Guide - Learn to build a functional DIY miniature cannon right in your workshop ...
BBC7 年
Make your own ping pong ball cannon
Make your own ping pong ball cannon 17 Comments Go back in time with past Blue Peter presenter John Noakes, as he shows you how to make your very own ping pong cannon ball.