Hot air balloons similar in my mind to submarines, are both totally spell casting and terrifying at the same time. What could make you feel more trapped? As a kid at Disneyland the submarine voyage ride (now closed) was one of my favorites.
Another kid-time favorite was Bedknobs and Broomsticks full of witchcraft, animation and otherworldly adventure.
Two other random movie recommendations to add to your que:
Dead Heat & Wristcutters: a love story