Michael is a young oboist at a conservatory and a talented gardener, but as he prefers the greenhouse to the obo his skills as a musician are lacking. He saves a potted plant and is thanked by Florence, the flower's fairy. She gives him the Semper Wand, which allows him to follow her into Flowerland – a world populated by a whole host of creatures, including a mischievous goblin who wants to conduct with the Wand. It is a world of wonder, ethereal beauty and music - but is threatened by the changing of the seasons. Can Michael save this world? Does his music career have a future?
Goshu is a small-town musician with a passion for playing the cello, and is a dedicated member of the local orchestra. With an important performance in a matter of weeks, the group practices daily to hone their skills. But lately, Goshu's musical ability has been lacking, and to get it back, he must accept help from the unlikeliest of kin -- the furry and feathered friends who dwell on his land...
A young classically-trained musician isn't faring too well under tutelage - and when alone soon finds himself enveloped in a strange and storngly musically inclined fantasy world. Both would serve rather ably as an introduction to classical music for children (or they would have when they were made). These two old anime films are exceptionally similar and both rather enjoyable (Yousei Florence moreso in my case).
Once there lived an eccentric author called Drosselmeyer who wrote grand tragedies - one of them was the tale of a prince who sealed away an evil raven by breaking his own heart into tiny pieces. However, before the story could be completed, the author died and the tale took on a life of its own. Now, in a town where fiction and reality meet, the story continues on its tragic course with Ahiru, a duck who transforms into the beautiful Princess Tutu in order to restore the prince's heart. But will Ahiru's act of love be enough to defy the story's terrible destiny and lead to a happy ending?
Each would serve as an excellent introduction to classical music for children; both meld music and fantasy with tragic romance, somewhat malevolent threats, and the power of music overcoming them - or in Tutu's case specifically, the power of ballet.