The reality is that robots can come in many different shapes and sizes. They don’t need to look like humans – in fact, most don’t. What a robot looks like (28) __________ on their purpose. Flying robots (29) __________ look like helicopters or have wings like insects or birds. Cleaning robots often look like little vacuums. Robots that (30) __________ to interact with people often have a face, eyes, or a mouth – just like we do! (31) __________ they look like us or not, most robots have three essential ingredients that make (32) __________ a robot: sensors, actuators, and programs.