An astonishing fact: the "general" meaning of "tissue" in English (just like "tissu" in French, "tessuto" in Italian, "tejido" in Spanish) IS "fabric". Someone could therefore think that the word "tissue" also applies to a napkin made of fabric. But no! Instead, it applies to a paper napkin... There are things, in the English language, which are beyond any logic....
napkins and tissues are different. a napkin is what youd get at a restaurant to clean up after eating, theyre very rough and will irritate (or hurt) your skin. tissues are very soft and are made for using on your face without hurting :)
I love the use of colors for the words being taught. Red is wrong, green is correct and purple isnt right or wrong it can be used but not necessarily the correct word for the item but understandable