Complex sentence: Nonsense verse is a form of light verse, usually for children, depicting imaginative characters in amusing situations of fantasy, whimsical in tone and with a rhythmic appeal, often employing fanciful phrases and meaningless made-up words.
Split into simpler sentences: Nonsense verse is a form of light, often rhythmical verse, usually for children, depicting peculiar characters in amusing and fantastical situations. It is whimsical and humorous in tone and tends to employ fanciful phrases and meaningless made-up words.