Shel Silverstein has a keen wit that he shows with both words and illustrations. The poems have a variety of structures. Some are just a few lines. Others extend for multiple pages. The rhythm and rhyme differ from poem to poem. Some are almost unstructured, while others have a strict rhythm and rhyme that just begs to be sung. The poems are geared towards children and often have a subversive twist. There are some that rely on simple wordplay. (In one, the kid ate a drumstick, much to the chagrin of the drummer.) There is a long one about peanut butter and a short song about sucking your thumb and many others.
The recording of Sir Gawain and the Green Knight included both a verse translation and a reading of the original version of the poem. In the original, bits and pieces are understandable, but it is only a little more understandable than Dutch to the native English speaker. The tail centers around Arthurian knights a duel and a quest with a lady.