I have yet to teach this lesson, but when I do I expect to have a healthy discussion on what is considered a robot and what's not. I feel the students will have their strong opinions on what is a robot and whats not even with having the requirements given. My extended activity would be to put them and groups and have them design a robot that would help them do something in their evryday life. They would have to use the robot at least 3 times a week to help them with something. They would have to explain what it does and what classifieds their invention as a robot. Initially I would follow the lesson step by step before doing any modifications. I would use any resources I could find on what a robot is before starting the lesson. I want to make sure I fully explain to the students why an item is a robot. I would love to have as many examples as possible.