Foster's Home for Imaginary Friends (Western Animation) - TV Tropes
I steal ze ducks from Crystal Pond! I have ze ear on the side of my face! Herriman : Well, of course it's five, you numbskull! Eduardo : Bloo? Bloo : You know, Ed, my opponents say five, but I say that's not good enough! I say SIX!
I Only Have Surprise for You (Foster's Home for Imaginary Friends)
He pitched them this simple premise: where do imaginary friends go when their young creators outgrow them? Why to Foster's Home for Imaginary Friends, of course! A home for imaginary friends whose kids have outgrown them, Foster's is a place where friends can live together until they are adopted by another child who needs them. Set in a world where imaginary friends are living, tangible beings who can be seen and heard by everyone including their creator, Foster's Home For Imaginary Friends follows Mac, a shy and creative 8 year old boy, who is forced by his mother to give up his imaginary friend Bloo, a walking, talking protection blanket.
Imaginary friends are created through the imagination of a child who desires a friend. Imaginary friends can come in all shapes, sizes, species, etc. It seems as though only humans can create them as imaginary friends don't seem to be able to create imaginary friends. The fact that imaginary friend creation is not as simple as it seems is further proven when Bloo goes to Mac's school's show and tell and impresses the kids so much that they try to imagine an imaginary friend like Bloo.