Mh, Coloring Fun, if I understand it right(i mean the sense), coloring fun is okay(in german), because the German would be too long: "Spaß am Farblichen Gestalten"(correct me if this is wrong wink ) - So how i said it´s very long. I would let it "Coloring Fun" - the only thing: May you should write it in British English "Colouring Fun".