The Golden Key
George MacDonald's The Golden Key
is a classic fairy tale in the truest form. A young boy hears a tale from his great-aunt about a golden key at the foot of the rainbow, and charges into Fairyland to find it where the indescribably beautiful colors end. Find it at the end of this Gutenberg collection of fairy tales
or in this Kindle version
, it's long enough for three or four story times. [Thanks Phill!