I was really disappointed with this colouring book. For a start it's not gigantic, it's A4 and not much thicker than standard books. The worst thing though is the quality of the paper. The pictures from the other side show through on every page, and that's before you've even started colouring! There is no way that felt tips can be used if you want to colour every page. I specifically chose this book because of the Crayola name - don't make my mistake. My little boy doesn't even bother with it now.