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Explore Cinder Blocks, Cinder Block Garden and more!

Toothpaste for dental care... no so much.

Commercial toothpaste is filled with stuff you don't want to be putting in your mouth, but it's great for uses around the house. Here's just a few ideas to get you started.

Cheap and Easy Passive Solar Water Heater for your Home. ($300)

Physics-exploiting axe splits wood in record time. Very cool tool from Finland! Chopping wood actually looks easy. It will set you back about $280 including shippiing :

Seriously clever! A headlamp around a gallon of water = ambient light for your tent and a great night lamp when the power is out.

21 DIY Emergency Preparedness Hacks

AAA Battery Substitutes: If you're out of AA batteries then you can use AAA batteries as substitutes just by packing the gap on the positive side of the battery with a wad of tin foil (same voltage for both type of batteries - just different sizes)...