(Room locations can be found at
http://www.fosters-home.com/houseparty/maps.htm)
Bloo- 3rd floor, bedroom #2
Eduardo- 4th floor, hospital room (sorry for posting the incorrect location before!)
Frankie- 4th floor, cafeteria
Herriman- 3rd floor, library
Mac- 4th floor, classroom #2
Madame Foster- 3rd floor, tea room
Wilt- 3rd floor, nap room
I looked everywhere, but I couldn't find Coco! (UPDATE - Coco is in the 4th floor toy room) BTW- Don't forget to check the fifth floor stairwell; you can go upstairs now to the rooftop terrace, which leads to the scary attic and the groovy observatory. I wonder if more stuff will open up?