... to buy yet more washi tape ? I think it may be.
I like to staple my student's assignments together along one edge but the rough side of the staples are always snagging against things, so I hit upon the idea of covering the stapled edge with washi tape. The possibilities are endless .... I can colour code by topic or subject ( especially useful for my dyspraxic children ) , brighten up their day , work my way through my washi stash ... which only means one thing .... I get to go and buy some more ! As they say ( somewhere) you can never have enough washi tape.