I've tested dozens of cheap multitools, and these are the few that I still use today

Personally, I don't recommend wasting money on cheap multitools. It's a false economy and a classic case of 'buy cheap, buy twice.' I've been sent dozens for testing, and they've all been poor quality ...
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How to make a simple DIY solar cell at home | Easy science project with household materials

Discover how to build a simple solar cell at home using everyday materials! This step-by-step tutorial demonstrates how to repurpose an aluminum can, a CD, copper wire, toothpaste, lemon juice, and a ...