A folding mechanism for a baby stroller frame usable with a foldable device having first, second and third frame members (12, 20, 30), comprising: - a first rotatable member and a second rotatable member (35") being rotatably mounted to rotate relative to each other, the first rotatable member being positioned for rotation in a first rotation plane and the second rotatable member being positioned for rotation in a second rotation plane spaced apart from the first rotation plane, wherein the first rotatable member is configured for attachment to the first frame member and the second rotatable member (35") is configured for attachment to the second frame member; and - a third gear (44, 44', 44") which extends between the spaced apart first and second rotation planes, configured for support by the third frame member, and in driving engagement with both a first radially outward gear portion and a second radially inward gear portion (39") so that the first rotatable member and the second rotatable member (35") rotate relative to each other in geared coordination, wherein a first pitch diameter of the first gear portion is sized to rotate the first rotatable member through a first angle of rotation from a folded position to an unfolded position and wherein a second pitch diameter for the second gear portion (39") is sized to rotate the second rotatable member (35") through a second angle of rotation from the folded position to the unfolded position, - wherein the first rotatable member and the second rotatable member (35") each have respective elongated apertures (41', 41"), the first rotatable member has the first radially outward gear portion, the first gear portion having a first set of gear teeth and the second rotatable member (35") has the second radially inward gear portion (39"), the second gear portion (39") having a second set of gear teeth, the first and second rotatable members (35', 35") each having the corresponding gear teeth formed along an edge portion of the corresponding one of the elongated apertures (41', 41"). - a first rotatable member and a second rotatable member (35") being rotatably mounted to rotate relative to each other, the first rotatable member being positioned for rotation in a first rotation plane and the second rotatable member being positioned for rotation in a second rotation plane spaced apart from the first rotation plane, wherein the first rotatable member is configured for attachment to the first frame member and the second rotatable member (35") is configured for attachment to the second frame member; and - a third gear (44, 44', 44") which extends between the spaced apart first and second rotation planes, configured for support by the third frame member, and in driving engagement with both a first radially outward gear portion and a second radially inward gear portion (39") so that the first rotatable member and the second rotatable member (35") rotate relative to each other in geared coordination, wherein a first pitch diameter of the first gear portion is sized to rotate the first rotatable member through a first angle of rotation from a folded position to an unfolded position and wherein a second pitch diameter for the second gear portion (39") is sized to rotate the second rotatable member (35") through a second angle of rotation from the folded position to the unfolded position, - wherein the first rotatable member and the second rotatable member (35") each have respective elongated apertures (41', 41"), the first rotatable member has the first radially outward gear portion, the first gear portion having a first set of gear teeth and the second rotatable member (35") has the second radially inward gear portion (39"), the second gear portion (39") having a second set of gear teeth, the first and second rotatable members (35', 35") each having the corresponding gear teeth formed along an edge portion of the corresponding one of the elongated apertures (41', 41").