Once you’ve gotten to your destination, how do you haul your little ones around? The Sit n Stand LX stroller from One Step Ahead is a streamlined two-seater that uses about as much space as a standard stroller. The front seat can hold an infant’s car seat, and the back one converts from a jump seat to a standing board. Each seat can hold up to 45 pounds. It costs about $130 through their catalog or at onestepahead.com.