"House of Bloo's" is the collective name for the first three episodes of the animated television series Foster's Home for Imaginary Friends.

The episode's plot follows Mac, an eight-year-old boy who is pressured by his mother to abandon his imaginary friend Blooregard Q. Kazoo, on the grounds that he is too old for him.

When Mac's mother tires of this behavior, she tells him that he has outgrown his age to have an imaginary friend and must get rid of Bloo.

Crushed by overhearing their argument, except for Terrence, who is rather pleased, Bloo later comes across a TV commercial for "Foster's Home for Imaginary Friends"—"where good ideas are not forgotten," according to the motto.

Basketball-loving Wilt takes over the tour and introduces Mac and Bloo to the wide variety of imaginary friends that live in the house.

Mac promises to stop by after school and departs, taking Coco's eggs with him and leaving Bloo alone with his new housemates, who show him their bedroom where he will be sleeping.

Wilt, Coco, and Eduardo race all over the house to keep Bloo out of reach, but the married couple's daughter finally snatches him away and shows him to her parents.

He meets Duchess, who plans to feed Bloo to an Extremeasaurus she freed earlier as revenge for unintentionally foiling her chance of being adopted.

As for Duchess, her punishment is to be forced to stay at Foster's, the place she hates so much, while Terrence finds himself at the mercy of a herd of annoyed unicorns, whom he had taunted earlier during the junkyard fight.

[3] Anita Gates of The New York Times praised the episode and stated that the series would promise to be an "admirable tale of loyalty and adventure-based learning with a contagious sense of fun".