Racks, sandwiches, and excellent buttons to push.

• I've no idea how I missed Henry Segerman until now. This is the antithesis of clickbait: a simple title, "expanding racks", hides a wealth of surprising visuals and explanations. There were multiple times, watching this video, where I said "oh!" out loud. Give it at least fifteen seconds. And full marks for including some project files in the description, too!
   
• "Spring is here" on the tiny garden railway, as miniature trains putter around pleasingly while being supervised by entirely out-of-scale cats. (Thanks to Paul for sending this over!)
   
• And how about Sandwiches of History trying the Cheepiknut Sandwich from 1936? This is a charming little channel that feels like Old YouTube: short videos, about one a day, straight to the point.
   

• "Frame of Preference" is a history of settings on the Mac. Which doesn't sound like much -- until you realise that the screenshots in the article aren't screenshots. They're fully-working Mac emulators, booting and fully usable in your browser. This requires a desktop or laptop and a decent internet connection, but: what an incredible demonstration of the possibilities of the web platform.
   
• "I’ve discovered that, scandalously, there is nowhere on the Internet that collects every single rhyme Craig Charles signed off Robot Wars with on one page. Enjoy."
   
• In 1973, GMC made a motorhome that pumped sewage through its exhaust on purpose.
   

And finally: the museum of pushing buttons.

All the best,

— Tom