The Arduino is to today what the PIC was to the previous decade, and what the Intel 8051 was to the last century: a single-board microcontroller ideal for experimentation.
The Micro:bit is an even smaller microcontroller from the UK.
While redesigning this website, I've been concentrating on some Browser-based games and on bringing my 1980's Radio Shack Color Computer software down into the 21st century. But, soon, I hope to get started on some programs and systems for the Arduino.
Meanwhile, you can visit some of the Arduino sites on my Links page to see what it's all about.