As a break from syllable counting (which I greatly enjoy), write a poem using any rhyme scheme or form you’d like (ABAB, AABB, ABA, etc.), but the poem must be an Eye Rhyme, where it rhymes visually, but not aurally. An example:
Young Dick, always eager to eat,
Denied stealing the fish eggs, whereat
Caning him for a liar,
His pa ate the caviar
and left Dickie digesting the caveat.