So, certainly the 31 drawings that are on the front side (the back or behind anything ...) BUT even using with gentleness and lightness of Pen 88 and 68 (felts of Stabilo brand), colors through ... Gel pens pass without problem. It'll just use colored pencils !!! Not tried with dry crayons, but you should be fine too. Mind you, with Derwent watercolor home, this will be the most beautiful effect In addition, each sheet is detachable ... To offer or frame! A coloring your ^ _ ^