Unusual musical fantasy, co-scripted by Dr. Seuss, follows a young boy's (Tommy Rettig) nightmares about his tyrannical piano teacher. Hans Conried is the fiendish Dr. Terwilliker, who keeps 500 boys locked in his bizarre castle and makes them practice day and night. The often surreal cult favorite for all ages co-stars Peter Lind Hayes, Mary Healy; songs by Friedrich Hollaender and Dr. Seuss. 89 min. Standard; Soundtrack: English. Region Free