This kit contains most of the parts you need to build an Arduino-controlled Zumo robot. It consists of a Zumo Shield for Arduino, v1.2, a Zumo chassis kit, and a Zumo blade. You will also need a pair of micro metal gearmotors, four AA batteries, and an A-Star 32U4 Prime or Arduino to complete your Zumo robot (motors, batteries, and Arduino sold separately). This product is a kit; assembly (including soldering) is required.
Pololu Web Site: https://www.pololu.com/product/2509