Some people may love cats but can’t own one due to allergies to limited space in their home. Other people may just like the idea of building a robot that happens to look like a cat.
In either case, for only $249, you can buy your own robot that looks like a cat. By building a robot cat, you can get it to follow you around and obey your commands, which a real cat would never do. So if you like the benefit of a cat without the drawbacks of a real cat, you might like building your own robot cat instead.