Eggshells can be used to control blossom end rot. Crush the shells of four eggs and mix them into the soil around each plant. The calcium in the eggshells will dissolve slowly into the soil, where it will be taken up by the plant's roots.
I found this one interesting because not only can it be considered a multiple because of the usage of only identical chairs, but also because of the strong presence of black and white stripes. It's kind of like a multiple within a multiple.