Technically, the extras in the Arduino Basic Kit aren't anything a savvy consumer couldn't order piecemeal, but there's something nice about having everything ready for you in one place.

Thankfully, Arduino forum member Romano d'Ezzelino has put together a series of reference cards that show the basics of a number of common connections.

This Arduino BASIC interpreter will make a really fun one-day project if you’ve already got the parts on hand. [Usmar A. Padow] put together an Arduino Uno, SD card, four line character LCD, … ...