To Hate A Pancake

Every year, the robotics class faced a challenge.
Last year, they had to move tennis balls from one container to another.
The year before, their robot had to snuff out candles.
It’s announcement Day, and the teacher cheerfully shouts to the class:
“This year, you will construct machines that hate pancakes.”
The students formed teams, and each were handed an identical basket full of spare parts.
Plus, a box of pancake mix.
Five weeks later, the confused students lined up their robots.
The first was turned on, and it attacked the janitor.
“Pancakes, not Mexicans!” shouted the teacher. “You fail!”