(1) - Little man depresses bellows.
(2) - Paper airplane is propelled by air from bellows, causing it to fly.
(3) - Airplane hits power button on television set, turning on channel 87.
(4) - Bird in cage, scared by the sound of the television's static, flies out of the cage.
(5) - Dart, which is lying at the end of the wrapping paper tube, is pushed in by the panicked bird.
(6) - The dart, which has been propelled through the tube, exits the end of the tube and hits the bullseye. The bullseye, however, is actually a pressure sensor built into the wall.
(7) - The robotic arm, which is released by the sensor, lowers to the level of the delivery man and signs an X on the paper, thus signing for the package.
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This key is for the entry 'How to Sign for a Package'!