Season 1
So what's a kid to do when they outgrow their imaginary friend? They find them a home at Foster's Home For Imaginary Friends. Madame Foster's is the perfect place to abandon wayward imaginary friends of all shapes and sizes. Like Blooregard Q. Kazoo, the obnoxious wise-cracking uh... blue blob. Eduardo, the big, giant monster who's afraid of his own shadow. Wilt, the tallest imaginary friend you could ever imagine. And Coco. We're not really sure what Coco's deal is, but she is apparently a bird of some sort. They've all taken up residence at Madame Foster's. and the place will never be the same again. Season 2
Eight-year-old Mac has outgrown his imaginary friend, says his mother, so he takes his buddy Bloo (a walking, talking security blanket) to Foster's Home for Imaginary Friends. Here all sorts of odd characters, given up by their creators, are welcome to stay until new kids come to adopt them. Mac strikes a deal with Madame Foster, the proprietor: as long as he comes to visit every day, Bloo will not be put up for adoption.
