Featured by William Gurstelle
Make a snowball slingshot and rule your neighborhood with an icy fist
Winter warfare will never be the same.
Throwing knives is growing more popular—here’s how to get started
Toss around some steel.
How to build a solar microscope
Project tiny specimens onto the walls of your own home.
Make these tiny, exploding hydrogen bubbles
Think of them like mini H-bombs.
How to build an hourglass watchtower
Survey any threats to your castle—er, home.
How to build a medieval crossbow
A Middle-Aged model
How to build a steam-powered cannon invented by Da Vinci
A less deadly version of the Architronito
Build a gas-powered marshmallow shooter
Inspired by fast-firing anti-aircraft guns
Build Your Own Mini Medieval Siege Weapon
A tiny version of one of history's most powerful trebuchets
Decorate Your Desk With This DIY Personal Sky Puppet
A wacky waving tube guy of your very own