The 5,000 Fingers of Dr. T.

A young boy who detests taking piano lessons, Bart Collins has developed a deep suspicion of his strict instructor, Dr. Terwilliker. Raised by his single mother, Heloise, Bart looks up to the local plumber August Zabladowski. When Bart ends up in a Seussian dreamworld, he must join with Zabladowski to rescue his mom from Dr. T's clutches and stop his plan to force 500 boys to play a massive piano in perpetuity.