生活智慧

can anyone guess what this is? was at a friend's place in tainan the other day and spotted this outside his own....another friend found it curious and asked what this is....i looked at it myself and was wondering what this is? i thought the straws were for watering the plant so that water can get into the roots of the plant...no? turn out, there are a lot of cats around and cats like to dig sand and soil a hole after they do they big business....in order to protect the plants from being digged out, my friend was clever enough to stick the straws all over so that when the cats try to poo, their butts will be poked....clever!!! i never thought of it...all i would do could be just put wire around...or put it at a high place...this is indeed a very good idea :D