Here are a couple of good stories to use when teaching commands.
En aquel prado is a book I actually start using the first week of Spanish 1 to practice numbers, but the best use of it is for commands. The most repetition is in uds and nosotros commands, although with the first animal there is a tú command. Fun to get a little loco with and make animal noises and change your voice for the baby animals. What happens is, the mom tells the babies (in increasing numbers) to do something, and then they all say “Let’s —-!” Wonderfully repetitive.
¡Muy bien, Fergus! is a good one for tú commands. Everyone can relate with trying to train a dog. There are a good 5 or 6 commands in there, at least. And it’s cute. 🙂
Incidentally, if you can put up with RBD, their Pepsi commercial from Christmas before last also has a lot of tú commands. And telling RBD’s story to teenagers is always fun & funny. Univision has a couple of good videos showing teenagers marching in protest, in tears, against their breakup. SO funny.