Elephants Dream (code-named Project Orange during production and originally titled Machina) is a 2006 Dutch computer animated science fiction fantasy experimental short film produced by Blender Foundation using, almost exclusively, free and open-source software.

An old man, Proog (voiced by Tygo Gernandt), guides the young Emo (voiced by Cas Jansen) through a giant surreal machine, in which the rooms have no clear transition to each other. After Proog saves Emo from flying plugs in a room consisting of a gigantic telephone switchboard, they run through a dark room filled with electrical cables and flee from a flock of bird-like robots. In the next room, Emo is tempted to answer a ringing phone, but Proog stops him and reveals a trap. The room is also occupied by a robot resembling a self-operating typewriter, which Emo appears to laugh at.

The next room is a large abyss from which metal supports appear from below; Proog nimbly dances across the abyss on the supports, while Emo casually walks along and does not seem to notice the stilts supporting him. Proog explains to Emo that the machine is like clockwork and could destroy them both if one wrong move is made. The two enter an elevator that is catapulted through a series of apertures by a pair of mechanical slats. Proog instructs Emo to close his eyes as they ascend to an empty dark void. Proog asks Emo what he sees, and is pleased by Emo's reply that he sees nothing as they plunge rapidly into the next room. A projector creates an image of a door from which music emanates. Emo asks to go through the door, but Proog insists that it is unsafe, and presses a button within his cane to enclose them both in a smaller room.

Proog asks Emo why he fails to recognize the beauty and perfection of the machine, to which Emo responds that the machine does not exist. Frustrated, Proog slaps Emo across the face, pushing the startled Emo to walk away. Emo mockingly imitates Proog's earlier tour to demonstrate the machine's absurdity and manifests the twisted versions of the Hanging Gardens of Babylon (in the form of mechanical roots) and the Colossus of Rhodes (in the form of gigantic hands), which threaten to destroy Proog's constructed world. Proog knocks Emo unconscious with his cane and causes his creations to disappear, Proog desperately asserts to Emo that the machine exists.