The leaves are thick so the felts do not cross, and anyway colorings are only one side of the sheet, the colors offered are varied without the need to have 40 different markers for the right shade. The coloring can be guessed but some others complete mysteries! Block size sheets are detachable if desired, and there are a lot of drawing to do, the numbers are very readable, areas with small coloriers so we take pleasure to be careful and look for all our areas! Wild and domestic animals, for those who love the coloring is perfect animal themes