This 2x18 header strip is very useful to connect Arduino shields. Primarily intended for the Arduino Mega. They can be used with Arduino shields because of their height.
SparkFun's minimal design approach to Arduino. This is a 5V Arduino running the 16MHz bootloader.
Indoor GPS Starter Kit featuring one Modem and five Beacons to get your project running. Accurately position your robot to a couple centimeters indoors! Kit includes one modem, 4 standard beacons and 1 beacon with built in IMU.