3pi Expansion Kit with Cutouts - Red
This kit gives you everything you need to add a second level to your 3pi robot.

$19.99

3pi Expansion Kit without Cutouts - Black
This kit gives you everything you need to add a second level to your 3pi robot.

$19.99

Orangutan USB Programmer
The programmer incorporates a USB-to-serial adapter and emulates an AVR ISP programmer.

$27.99

USB AVR Programmer
The Pololu USB AVR Programmer is an extremely compact, low-cost in-system programmer (ISP) for Atmel's AVR mirocontrollers, which makes this device an attractive programming solution for AVR-based controllers.

$19.99

Sharp Analog Distance Sensor 10-80cm
The Sharp distance sensor is a great way to add obstacle avoidance or motion sensing to your robot or any other project.

$16.95

3-Pin Female JST Cable for Sharp Distance Sensors
This 12-inch cable has three 26 awg wires with a 3-pin female JST connector that matches the connector on Sharp analog distance sensors.

$.99

Replacement 3pi Ball Caster with 1/2in. Plastic Ball
This ball caster can be used as a replacement 3pi robot part or as a general-purpose ball caster.

$2.75