Siesta

Elisabeth picked out Siesta at the library recently, and she loved it. It employs simple, vivid simple illustrations in a simple story. Although the story is in English, the story teaches color words in Spanish, along with a few other Spanish words.

Since the story is simple and short, and the illustrations are vivid, it is easy to read the story multiple times in a sitting - thus reinforcing the Spanish words and their English counterparts. As such, I think it is a great way to teach the Spanish color words.