Backyard Water Rocket With a catch & release mechanism, you can get higher pressure--with significantly higher flights! This version will be safer, especially with small kids around. (Popular Mechanics)
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This Is the Coolest Cyberpunk Watch Ever - Popular Mechanics
Build a Woodworker’s Toolbox by Popular Mechanics (this could easily work for fly fishing stuff)
Comment fabriquer un escalier
How to fix up your car's interior on the cheap - several ideas from Popular Mechanics.