A stroller has at least one seat supported by a frame assembly. The seat has a seat back and a seat bottom. A traversing structure extends laterally across the seat, is spaced forward of a surface of the seat back, and is spaced upward of a surface of the seat bottom. A foot opening is positioned beneath the traversing structure, above the seat bottom, and between opposed and spaced apart side frame sections of the frame assembly. A passive restraint obstruction extends from a portion of the stroller into the foot opening and reduces a size of the foot opening. The obstruction creates a passive restraint to inhibit a child from fitting through the foot opening.