If you want to give your credit card some exercise, head out to Diagonal Mar Shopping Mall in Sant Martí. Hotels.com travelers also say the area is family-friendly and has lots of nice beaches. It's also full of great shops and restaurants, so you can spend the afternoon having a wander.
Why not spend a carefree afternoon at Llevant Beach during your travels in Barcelona? Check out the shops and top-notch restaurants in this romantic area.