The walls are painted in the color "sour cream." It resembles white but has a nasty odor. It depicts slum schoolchildren's despair, dejection, and disillusionment on their faces. These walls convey a crumbling look, and as a result, the slum children are in a pitiful and wretched condition of things. Sour grapes is a reference to the bitterness that some people feel because they do not have what others have. This poem tells us that life is like this bitter grape juice- it hurts anyone who drinks too much. The more you drink, the more you want to drink! In conclusion, this poem tells us that life is full of sorrow, pain, and misery but that we should never lose hope or faith in humanity because many good things also happen every day.