Make a word photo of someone you know, not a formal portrait, but a quick candid shot of the person engaged in some characteristic activity--your brother playing with his Lego blocks, or your best friend serving a tennis ball, for instance.
Edwin Arlington Robinson wrote many poems that resemble snapshots, including "Aaron Stark." Maurya Simon's "The Fishermen at Guasti Park" also has such a snapshot feel about it, as does Lucille Clifton's "miss rosie."
In your snapshot include some reference to an animal, a color, a time of year, a tool, and an article of clothing. Be sure to include plenty of concrete, specific details. Avoid abstract or emotional language as much as possible. Focus on getting a clear image of the subject.
Your finished poem should be no more than 12 lines long.