brain teaser

Build This Brain-Teasing Golf Ball in a Block of Wood

Build This Brain-Teasing Golf Ball in a Block of Wood

When we published the Tooth and Nail brain teaser here on Make: back in February, it got a large and enthusiastic response. Apparently, others love this kind of wooden head-scratcher as much as I do. So, here’s another easy-to-make brain teaser, the Golf Ball in a Block of Wood. It uses the same hot water […]

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Like Brain Teasers? This DIY Puzzle “Nails” It

Like Brain Teasers? This DIY Puzzle “Nails” It

It’s called the “Tooth and Nail” puzzle, and it appears to be an optical illusion. It is not.

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