Dec. 15 & 19. Adults and kids ages 10 & up invited to learn basic coding. Dec. 15: A chance to program a powerful Micro:bit mini computer packed with LEDs, sensors, and a radio transmitter. Dec. 19: Introduction to Web Pages offers a chance to learn basic web coding and page layout with HTML and style sheets. 6–7 p.m., AADL Downtown. Free. 327–4200.