Get a piece of yarn, some colours and sheets of cardboard and try these flowers.
I used water and liquid watercolours (yes, a big fan of them here) but you can use food colouring or normal pains (dissolved in some water). Soak the yarn/string in it, put it on a sheet of cardboard inside of a box and add another sheet on top. Close the book and pull the string gently. Open up to see your creation. Make sure to use a few kitchen towels inside the book if you want to avoid spoiling the book. Most of the flowers will look like calas.