
Children who create imaginary friends usually take care of them until they are 7-8 years old. Imaginary friends, left on their own after this event, continue to live in this home founded by old Madam Foster.






Mr. Herriman sends Frankie to the mall to get streamers for Madame Foster's birthday party, and Mac, Bloo, Eduardo, Wilt, and Coco end up coming along. Eventually, they each wander off in a different direction after being distracted by something.
Bloo discovers a door in Foster's that everyone is forbidden to open, and nobody tells him what's behind it. One night he opens it, and releases Scribbles, a friend that does jobs around the house and causes everyone to become lazy.