In my opinion, Herve Tullet's books contain the essence of childhood; freedom of expression, creativity, innocence, the act of learning through play and exploration, all with plenty of laughter. His books ooze enjoyment and discovery. Magpie That This might be a book designed for kids, but I reckon that many a parent will soon be surreptitiously having fun with it too. It's Nice That Mix It Up! works a bit like a flip book, with finger splodges mixing ad scattering and smudging as the pages turn. It's bright and it's cheery; it'll have little tykes (and some big kids too) making pretty pictures in no time.' It's Nice That Herve Tullet's Mix It Up! allows us all to experience the same thrill of discovery,the buzz that comes from a lightbulb moment; it takes us back to the very bare bones of colour theory and shows us magic at our own fingertips. That mixing yellow and blue should give us a total different colour... Well that's pretty cool if you think about it. Zoe Toft of Playing by the Boo