The MicroUSB Digispark compatible developing board is an Attiny85 based microcontroller, board similar to the Arduin0 line, only cheaper, smaller, and a bit less powerful. With a whole host of shields to extend its functionality and the ability to use the familiar Ard. IDE the Digispark is a great way to jump into electronics, or perfect for when an Ard. boards is too big or too much.
The Digispark is shipped fully assembled except for the two included and easy to solder pin headers.