Try out some light verse with ideas from Doris Corti
People are inclined to look down on poets writing humorous verse. But this is the case only if fun poems are badly written. Limericks, rhymes, plays on words, all used in humorous poems, often exude wit and cleverness. Hyperbole, deliberately exaggerating to create an effect, is another useful tool.
Structurally, repetition and alliteration help in highlighting certain words, lines or phrases that express humour.