Have you seen the beautiful book Japanese Nursery Rhymes: Carp Streamers, Falling Rain and Other Traditional Favorites yet? It is definitely worth flipping through and listening to the accompanying CD. I snagged it out of the new books pile because I thought several rhymes would make wonderful flannel boards.
The first one to catch my eye was page 15's The Little Red Bird (Akai tori kotori). The book translates the words as:
Why oh why so red?
Why oh why so blue?