...Trecorum Satis Dee. I never forget that spell (although I had to look up how to spell the, um, spell). I've always loved Bedknobs & Broomsticks, even more than Mary Poppins, which has a similar style with live action and animation.
...there lived a hobbit. Today I have Rankin Bass' The Hobbit read-along. I've never actually seen the animated movie. Looking at the list in the inside back cover I saw one listed for Return of the King, but not the other books.