now you see it...

...now you don't

Remember those funny magnet boards from your childhood? You could draw anything on them and then, by some miracle, it dissapeared and you could draw again and again...

Well, they're useful to adults, too. For example, advertising agency Dentsu from Malaysia used them as a clever interactive way to demonstrate the power of Attack, a laundry detergent: draw a spot - then clean it right away!

Nice slogan endorsement, too: "One scoop for amazing results". Great idea!

via directdaily.