Cómo Nació El Arco Iris by Alma Flor Ada. Recommended reader for Lesson 3 - ¿De qué color es? - in the Sonrisas Elementary Curriculum Level 1 (under Elementary Curriculum).
Appearing at a time when the whole world was just black, white, and different shades of gray, three colors--red, blue, and yellow--decide to make a contribution to the planet. The blue begins first and paints the rivers, the sky, and some birds. Red follows by painting strawberries and apples and another kind of bird. Yellow, believing the other two colors are lost without him, gives color to the sun and the sunflowers. Then they combine to create more colors. The story is simply told and illustrated with brilliant watercolors. The text is short and printed in bold type.
Paperback, 16 pages.