Foster's Home for Imaginary Friends
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50 free Foster's Home for Imaginary Friends trivia questions with answers — trivia quiz, new questions added Oct 2026.
Foster's Home for Imaginary Friends ran on Cartoon Network from 2004 to 2009 and built a whole universe on one idea: when children outgrow the friends they invent, those friends need somewhere to live. The result was a Victorian mansion packed with oddballs, a boy who refuses to say goodbye, and a blue troublemaker with an ego far bigger than he is. This quiz covers the people and creatures who make the house tick, from Mac and Bloo to Wilt, Eduardo, Coco, Frankie, Mr. Herriman and Cheese, along with standout episodes, the feature-length specials, the voice cast and the story of how the series was made. It starts with the things most viewers remember and works up to details that reward a rewatch. It is written for anyone who grew up with the show and for newer fans finding it for the first time. Every answer comes with a short explanation, so you learn something even when you miss.
30 of 50 questions with answers and explanations. Play the quiz
Q 01Which 1980s pop star interrupted the Foster's characters at the 2008 Macy's parade as a live internet prank?
Rick Astley
Rick Astley cut in singing Never Gonna Give You Up, turning the Foster's float into a live Rickroll. The float, built as a replica of the mansion, rode in the parade three years running.
Q 02The idea for Foster's Home for Imaginary Friends came after its creator adopted which animals from a shelter?
Two dogs
Two dogs from an animal shelter sparked the show. Wondering what their lives had been like before adoption led to a house full of outgrown imaginary friends waiting for new families.
Q 03Which actor, famous as the voice of SpongeBob SquarePants, played the timid purple giant Eduardo at Foster's?
Tom Kenny
Tom Kenny gave Eduardo his nervous, gentle voice, having already played the Mayor and the Narrator in The Powerpuff Girls.
Q 04Wilt, the towering red basketball fan at Foster's, lost which part of his body while saving his creator during a game?
His left arm
His left arm was lost when Wilt took a blow meant for his creator, and the same accident bent one of his eye-stalks. He then ran away out of shame, sure he had let his friend down.
Q 05Coco, the bird-like friend at Foster's who can only say her own name, lays eggs made of what?
Plastic
Plastic eggs are Coco's speciality: each colorful shell holds an object of her choosing. Tools from a batch of them once helped Mac break out of a locked closet.
Q 06Which everyday ingredient turns sensible young Mac from Foster's uncontrollably hyperactive after a single taste?
Sugar
Sugar sends Mac into a rabid frenzy, hunting for more of it. Bloo once strapped him to his bed on Halloween to keep him away from trick-or-treating.
Q 07Which drink does Cheese adore in Foster's Home for Imaginary Friends, even though he is lactose-intolerant?
Chocolate milk
Chocolate milk sits beside goldfish crackers, cereal and juice on the list of things Cheese loves, and his lactose intolerance never puts him off it.
Q 08Mr. Herriman, the monocled business manager Madame Foster imagined as a child, is what kind of animal?
Rabbit
Rabbit is right: Mr. Herriman is a lop-eared one in a tailcoat and top hat. Madame Foster dreamed him up as a girl and, unlike most children, never gave her friend up.
Q 09What grand full name does Bloo, the blue friend Mac dreamed up, claim for himself at Foster's?
Blooregard Q. Kazoo
Blooregard Q. Kazoo is the name Bloo gives himself, a mouthful for a simple domed cylinder that Mac imagined when he was three years old.
Q 10Which animator, already known for The Powerpuff Girls, created Foster's Home for Imaginary Friends for Cartoon Network?
Craig McCracken
Craig McCracken designed the main characters himself, and has said Bloo reminds him of the attention-seeking child he once was.
Q 11How often must Mac visit Foster's to stop Bloo being put up for adoption, under the deal Madame Foster allows?
Every day
Every day is the deal, and it bends the house rules so far that Mr. Herriman resents it. That grudge is why he comes down so hard on Bloo.
Q 12Frankie, the 22-year-old who cooks and cleans at Foster's, is related to its founder Madame Foster in what way?
Her granddaughter
Her granddaughter Frankie was raised by Madame Foster and keeps the whole house running, though Mr. Herriman rarely thanks her for it.
Q 13Which language does Eduardo, the huge horned friend at Foster's, speak alongside English?
Spanish
Q 21In the special Destination: Imagination, what holds the vast land where Frankie from Foster's is treated like royalty?
A toy chest
A toy chest found chained on the doorstep hides the place. Frankie peeks inside against orders, worn out by endless chores that nobody thanks her for.
Q 22Why does Foster's become badly overcrowded soon after Mac meets the talkative girl Goo?
She keeps imagining new friends
She keeps imagining new friends on each visit, because her odd ways had cost her any real ones. Goo stops once Mac tells her to get to know those she has already made.
Q 23Nina Valerosa dreamed up Eduardo of Foster's to protect her as a child; which job does she hold as an adult?
Spanish runs through Eduardo's speech, and his design blends a minotaur with the beasts of the picture book Where the Wild Things Are.
Q 14Which habit is Wilt, the gentle giant of Foster's, so well known for that housemates take advantage of him?
Constant apologizing
Constant apologizing is Wilt's trademark, along with never refusing a favor. In one episode he keeps missing a big game because he cannot turn down a single request.
Q 15Who tells eight-year-old Mac that he is too old for an imaginary friend, forcing Bloo to move into Foster's?
His mother
His mother makes the demand because she gave up her own imaginary friend at Mac's age, and she seems to have no idea that he still sees Bloo.
Q 16Coco's body is shaped like an airplane at Foster's, but her head resembles which plant?
A palm tree
A palm tree, fronds and all, tops Coco's head above a crooked red beak. Despite the airplane build, she can neither fly far nor hover for long.
Q 17Which plaything does Bloo adore and brag about at Foster's, even though he can rarely get it to work properly?
Paddle ball
Paddle ball is Bloo's obsession, though he rarely makes the two parts meet. A rich boy once tempted him away from Mac with an automatic machine for it.
Q 18Eduardo looks fearsome at Foster's but is scared of almost everything; which creatures frighten him most of all?
Spiders
Spiders top Eduardo's long list of fears. He still turns ferocious when friends are in danger, and once outfought the scariest monsters in a junkyard battle.
Q 19Which ill-tempered resident of Foster's schemes with Mac's bullying brother Terrence to get rid of Bloo in the premiere?
Duchess
Duchess wanted revenge after Bloo spoiled her chance of adoption by a wealthy couple. Her punishment was having to stay in the house she calls a dump.
Q 20Bloo starts a booming business selling which of Madame Foster's treats, at first to fund a new roof for the house?
Cookies
Cookies from Madame Foster were meant to pay for the roof, but success goes to Bloo's head and he grows obsessed with turning them into big business.
Police officer
Police officer Nina Valerosa now does the protecting herself. She joins the search party when Wilt goes missing in Good Wilt Hunting.
Q 24Cheese first seemed to be Mac's accidental creation at Foster's, but who had really imagined him?
His neighbor Louise
His neighbor Louise created Cheese, which is why he is only a visitor to the house for most of the series, turning up uninvited again and again.
Q 25Which actress, the voice of Bubbles in The Powerpuff Girls, played Mac's bullying older brother Terrence at Foster's?
Tara Strong
Tara Strong played the acne-faced bully Terrence, one of several Powerpuff Girls voice actors who followed the show's creator to his next series.
Q 26On which American holiday did the Foster's specials Good Wilt Hunting and Destination: Imagination both premiere?
Thanksgiving
Thanksgiving was the slot both times, two years apart, and the earlier special opened a holiday marathon of the series.
Q 27In which sport does Madame Foster of Foster's lead a team against her old rival Flo Jerkins?
Bowling
Bowling brings out Madame Foster's competitive side. Mac recruits the gang for her team, gets dropped from it, and turns to an imaginary guru for coaching.
Q 28In Cheese a Go-Go, a science fiction film and a tabloid convince Bloo of Foster's that Cheese is secretly what?
An alien spy
An alien spy scouting for an invasion is Bloo's theory. He ends up on the house observatory's intercom, trying to reach outer space himself.
Q 29In The Big Cheese, a new security system locks everyone out of Foster's; how had Cheese memorized the password?
As a song
As a song is how the code stuck in Cheese's head, leaving the locked-out household at the mercy of its most irritating visitor just as a news crew was due.
Q 30Which honor did the Foster's special Destination: Imagination win, beating Afro Samurai: Resurrection to it?
A Primetime Emmy
A Primetime Emmy for Outstanding Animated Program went to the special, which lost both of its Annie nominations to Avatar: The Last Airbender.