The first book to illustrate a pencil was published in the 16th century, and its author was more interested in the properties of the lead than the implement itself. On Fossil Objects (De Rerum Fossilium Lapidum et Gemmarum Maxime, Figuris et Similitudinibus Liber) (1565) by Conrad Gessner was also the first book to systematically illustrate fossils, with basic woodblocks of ammonites and crinoids accompanying his Latin text.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.