Pololu are an electronics manufacturer and online retailer. They provide various robot platforms. You can see a list of robot platforms at https://www.pololu.com/category/2/robot-kits. Some robot platforms are available as robot kits without soldering. This means you can get your robot up and running without performing soldering on the kit. You can see a list of solder-less robot kits at https://www.pololu.com/category/4/robot-kits-without-soldering.

One robot kit you can make without soldering is the Zumo robot for Arduino. This kit enables your Arduino-based Arduino UNO model to be attached to the board. If you are interested in this robot kit, you can check it out on https://www.pololu.com/product/2510. The Zumo robot for Arduino can be seen here: