Dev Gualtieri's newly published Secret Codes & Number Games: Cryptographic Projects & Number Games for Children Ages 5-16 is a thoughtfully designed introduction to crypto for kids.
It builds from a potted history of secret messages to a series of simple substitution ciphers, DIY cipher-wheels, fun steganography examples (like encoding messages with flowers or cartoon pigs), to advanced subjects like keyed ciphers, the Polybius cipher, the Vigenère cipher, and some exciting work with vectors.
The $18 paperback isn't cheap (it's a Createspace publish on demand title, and they're pricier than mass-produced titles), but there's a real shortage of material like this, and the price won't break the bank. There are kids for whom this would be the perfect gift, and it would also make a great addition to library collections (especially school libraries). There's a preview here.
Secret Codes & Number Games: Cryptographic Projects & Number Games for Children Ages 5-16
Peter Biddle writes, “I get I myself into trouble. I don’t claim that bad stuff happens to me more often than others – it’s more that I find more ways to happen to bad stuff. I actually found a way to get severe hypothermia in 105°F heat.”
Lisa Gold is the extraordinary researcher who is perhaps best know for her work with Neal Stephenson, particularly on the Baroque Trilogy.
Dungeons and Dragons Beyond is an official digital companion to D&D, with a free character-generator and a bunch of paid additions, from access to hyperlinked editions of the rulebooks ($30/each), and a $3/player, $6/DM subscription service that lets DMs share their books with players.
Toaster ovens are the perfect appliance for small things like toasted sandwiches and roasted garlic (try it!), but anything more involved usually requires a full-sized conventional oven.However, despite its small size, the Wolfgang Puck Pressure Oven can handle anything from baked pastries to broiled meats. This kitchen appliance has a minimal countertop footprint, and cooks […]
The Pry.Me Bottle Opener holds tens of thousands of times its own weight, and you can pick one up now from the Boing Boing Store.This remarkable keychain is considerably smaller than any of your keys, but don’t let that fool you: it can easily open any bottle, and could even tow a trailer full of […]