The Digispark is a microcontroller development board based on the Attiny85, similar to the Arduino series, more economical, smaller, and less powerful. With a multitude of shields to expand its functionality and the ability to use the well-known Arduino IDE, the Digispark is a great way to get into electronics or when an Arduino would be overkill for the use you want.
The Digispark is shipped fully assembled except for the two included and easy-to-solder Headers.