Magnetic poems can be a fun activity for the whole family. You can find little tins of magnetic words on Amazon. If you have small children at home, you may also have letter refrigerator magnets on hand. Either can work.
Give your teen (or the whole family) challenges to complete on the refrigerator. For example, who can create a 15 line poem that includes an extended metaphor? Who can create a poem with a specific theme in just 15 minutes? Your teen can try this on their own, but a competition is always fun.