The Victorinox Soldier is the classic Swiss Army knife (SAK). Each has a date stamp and this set is from 1934, 1965, 1970 and 1997. Also note the evolution of the blade (from clip point to spear point), scales (from fiber to alox), the bail arm of the 1970 model and the hollow rivet in the 1965 version.
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My wife wanted me to build her a shoe rack. Since you can buy one from Ikea for $20 and it is hardly going to be furniture, why not spend a day building one for considerably more?
The importance of stupidity in scientific research by Martin A. Schwartz is good essay on the nature of research. It explains that research is immersion in the unknown, we don’t know what we are do...