Here are the several types of thinking over before deciding on one:
Side-by-side stroller. Classic double stroller design.
Tandem stroller: In this stroller, infants and toddlers often face forward, one in the rear of the other.
Sit-and-stand stroller. These double strollers are ideal for large children who can easily leap on and off the backseat.
Wagon stroller. It has a push and pulls feature that other strollers do not have.