Mr. Octopus Sells Umbrellas is a picture book special for children aged 0-3 regarding animal cognition and color enlightenment.It's raining! Mr. Octopus begins to sell umbrellas! Elephants, lions, peacocks...what they want are all different. Look at animals that can change color and those "invisible" animals! Their requirements are a bit strange. Can Mr. Octopus’ umbrellas satisfy to everyone?Let's play color games with Han Xu! Let's make children experience the fascination of color with adorable animals and wonderful plots. (E- book, Audio- book and Interactive Ebook available)