Retro Radio Rainbow teaches the 7 colors of the rainbow in the coolest way ever! Radio was king in the 40s and 50s, so manufacturers had to come up with eye-popping designs in a spectacular array of colors in order to stand out. Their competition resulted in the most amazing radios in every color of the rainbow! Here's a book that will have the parents saying, "Can we read it one more time?" Your children will be so dazzled, they might even forget to ask you what a radio is!