Sally and Nick want to paint rainbows, but they don't know what colours to use, or what order to put the colours in. And where do rainbows come from, anyway? The Cat in the Hat is not quite sure himself, but he knows someone who will know - King Kaleidoscope, ruler of Colourgalore! Come and visit the King in this funny, fact-packed book, featuring 3D artwork on every page - and a pair of 3D glasses.