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.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.