Many educational robots tend to be complex and expensive, or simple and cheap. Where’s the middle ground for students who want to build sophisticated things, but don’t want to pay a fortune just to get started? iRobot thinks it can reach that happy balance with its new Create 2 robot. It’s effectively a Roomba 600 series vacuum turned into a hacker’s paradise. Instead of the usual cleaning equipment, you’ll find easily accessible, clearly marked spaces that practically beg for add-on hardware.