Meet the Seek N’ Sneak 2: a versatile robot pet powered by Arduino that can find objects, grab/move them, and chase other robots. It has two driving wheels that are powered by independently controlled motors. Its arm relies on 3 servo-motors, powerful enough to push up to 3 pounds or even throw objects.
The Seek N’ Sneak robot is powered by an Arduino Mega 2560. The open source software can be modified as you wish. Seek N’ Sneak robots can find and collect objects, chase other robots, and do a whole lot more. The above video highlights what this robot is capable of.