This high-tech Confectionery Cannon uses a webcam to fire marshmallows at willing participants.

Four students at the Olin College of Engineering in Massachusetts were given $250 and three months to build something for a class project. The result of their efforts: the Confectionery Cannon.

Built mostly from acrylic, PVC, and scrap aluminum, the Confectionery Cannon is essentially a face-tracking, marshmallow turret. Using custom-fabricated components and two nano servos, the cannon can auto-reload for a firing speed of approximately six large Jet-Puffed marshmallows every 10 seconds. And the pneumatic firing system employs a compressor that’s capable of producing up to 135 PSI to get the shots off.

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