I just found this site and I hope you can help me find the title to a book I remember as a child in the 1950's.
The story was about a brother and sister that live at the edge of forest and find a key and tree with a keyhole. Turning the key transports them to fairyland where they play with the fairy's and attend the fairy ball. They fall asleep after the ball and find themseles back at the tree and they still have the key and they see that they can return any time back for a visit to fairyland. That is how I remember the story, I may be a little off. I know it was a Little Golden Book, but I can't find it anywhere. I thought the title was The Magic Key, but I am wrong. Does anyone remember this book and know the name of it? Thank you so much for your help!