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A juvenile stroller includes a mobile base and a juvenile seat mounted on the mobile base. The mobile base includes wheels and a foldable frame carrying the juvenile seat.

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1. A compact collapsible stroller comprising a cart including a frame mount and at least one rear wheel mounted to rotate relative to the frame mount, a rolling cart stabilizer including a front wheel mount and at least one front wheel mounted to rotate relative to the front wheel mount,a first cam-

1. A compact collapsible stroller comprising a cart including a frame mount and at least one rear wheel mounted to rotate relative to the frame mount, a rolling cart stabilizer including a front wheel mount and at least one front wheel mounted to rotate relative to the front wheel mount,a first cam-fold unit including a base member coupled to the frame mount of the cart to move therewith, a follower coupled to the rolling cart stabilizer to move therewith, a motion-transfer pin arranged to extend into a pin-receiver slot formed in the base member and a motion-transfer slot formed in the follower, and a pin mover formed to include a motion-inducement slot receiving a portion of the motion-transfer pin therein, anda cart pusher coupled to the pin mover, wherein the motion-transfer pin is arranged to move in a first direction simultaneously in each of the pin-receiver, motion-transfer, and motion-inducement slots to engage the pin mover to simultaneously rotate the follower about a pivot axis in a counterclockwise direction and the cart pusher about the pivot axis in an opposite clockwise direction to cause the follower and the rolling cart stabilizer coupled to the follower to pivot about the pivot axis in a counterclockwise direction toward the cart to assume a folded front position alongside a front portion of the cart in response to movement of the cart pusher about the pivot axis in a clockwise direction toward an opposite rear portion of the cart so that the compact collapsible stroller is converted from an expanded use mode to a compact collapsed storage mode and to simultaneously rotate the follower about the pivot axis in the clockwise direction and the cart pusher about the pivot axis in the counterclockwise direction to cause the follower and the rolling cart stabilizer coupled to the follower to pivot about the pivot axis in a clockwise direction away from the cart to assume an unfolded front position extending in a forward direction away from the cart in response to movement of the cart pusher about the pivot axis in a counterclockwise direction away from the cart so that the compact collapsible stroller is converted from the compact collapsed storage mode to the expanded use mode. 2. The compact collapsible stroller of claim 1, further including a follower axle coupled to the base member and arranged to establish the pivot axis, the follower is mounted on the follower axle for rotation about the pivot axis, and the pin mover is mounted on the follower axle for movement relative to the pivot axis. 3. The compact collapsible stroller of claim 1, wherein the motion-transfer slot formed in the follower is curved. 4. The compact collapsible stroller of claim 3, wherein the motion-transfer slot is bounded by a curved inner edge having a first radius of curvature and a curved outer edge having a relatively larger second radius of curvature and the curved outer edge is arranged to lie in spaced-apart relation to the curved inner edge and share a center of curvature with the curved inner edge. 5. The compact collapsible stroller of claim 4, wherein the curved inner edge is arranged to lie in a space provided between the pivot axis and the curved outer edge. 6. The compact collapsible stroller of claim 4, wherein the curved outer edge has a concave shape and is arranged to face toward the pivot axis and the curved inner edge has a convex shape and is arranged to face away from the pivot axis. 7. The compact collapsible stroller of claim 4, wherein the motion-transfer slot is also bounded by a first end edge and an opposite second end edge, the first end edge interconnects the curved inner and outer side edges and lies at a first end of the motion-transfer slot to mate with the motion-transfer pin upon arrival of the follower and the rolling cart stabilizer at the unfolded front position associated with the expanded use mode of the compact collapsible stroller, and the second end edge interconnects the curved inner and outer side edges and lies at an opposite second end of the motion-transfer slot to mate with the motion-transfer pin upon arrival of the follower and the rolling cart stabilizer at the folded front position associated with the compact collapsed storage mode of the compact collapsible stroller. 8. A compact collapsible stroller comprising a mobile base anda juvenile seat coupled to the mobile base,wherein the mobile base includes a cart and a cam-driven foldable frame mounted for folding and unfolding movement on the cart and configured to include a cart pusher, a rolling cart stabilizer, and a first cam-fold unit coupled to the cart and to each of the cart pusher and the rolling cart stabilizer,and wherein the first cam-fold unit includes a base member formed to include a pin-receiver slot and an axle, an inverse cam including a follower coupled to the rolling cart stabilizer to move therewith and mounted on the axle to pivot about a pivot axis established by the axle and a motion-transfer pin arranged to extend into and slide back and forth in the pin-receiver slot formed in the base member and in a motion-transfer slot formed in the follower, and a pin mover coupled to the cart pusher to move therewith and configured to move the motion-transfer pin in a first direction in the pin-receiver slot formed in the base member and simultaneously in the motion-transfer slot formed in the follower to apply a pivot-inducing force to the follower to cause the follower and the rolling cart stabilizer coupled to the follower to pivot about the pivot axis in a counterclockwise direction toward the cart to assume a folded front position alongside a front portion of the cart in response to movement of the cart pusher about the pivot axis in a clockwise direction toward the cart so that the compact collapsible stroller is converted from an expanded use mode to a compact collapsed storage mode and for alternatively moving the motion-transfer pin in a second direction opposite to the first direction in the pin-receiver slot formed in the base member and simultaneously in the motion-transfer slot formed in the follower to cause the follower and rolling cart stabilizer coupled to the follower to pivot about the pivot axis in a clockwise direction away from the cart to assume an unfolded front position extending in a forward direction away from the cart in response to movement of the cart pusher about the pivot axis in a counterclockwise direction away from the cart so that the compact collapsible stroller is converted from the compact collapsed storage mode to the expanded use mode. 9. The compact collapsible stroller of claim 8, wherein the pin-receiver slot formed in the base member is substantially straight and the motion-transfer slot formed in the follower is curved. 10. The compact collapsible stroller of claim 8, wherein the pin-receiver slot formed in the base member is curved and the motion-transfer slot formed in the follower is curved. 11. The compact collapsible stroller of claim 10, wherein the motion-transfer slot is bounded by a curved inner edge having a first radius of curvature and a curved outer edge having a relatively larger second radius of curvature and the curved outer edge is arranged to lie in spaced-apart relation to the curved inner edge and share a center of curvature with the curved inner edge. 12. The compact collapsible stroller of claim 11, wherein the curved inner edge is arranged to lie in a space provided between the pivot axis and the curved outer edge. 13. The compact collapsible stroller of claim 11, wherein the curved outer edge has a concave shape and is arranged to face toward the pivot axis and the curved inner edge has a convex shape and is arranged to face away from the pivot axis. 14. The compact collapsible stroller of claim 11, wherein the motion-transfer slot is also bounded by a first end edge and an opposite second end edge, the first end edge interconnects the curved inner and outer side edges and lies at a first end of the motion-transfer slot to mate with the motion-transfer pin upon arrival of the follower and the rolling cart stabilizer at the unfolded front position associated with the expanded use mode of the compact collapsible stroller, and the second end edge interconnects the curved inner and outer side edges and lies at an opposite second end of the motion-transfer slot to mate with the motion-transfer pin upon arrival of the follower and the rolling cart stabilizer at the folded front position associated with the compact collapsed storage mode of the compact collapsible stroller. 15. The compact collapsible stroller of claim 14, wherein the pin-receiver slot is bounded by substantially straight first and second side edges arranged to lie in substantially spaced-apart parallel relation to one another, a first end edge arranged to interconnect the first and second side edges and to lie in spaced-apart relation to the pivot axis at a first end of the pin-receiver slot, and a second end edge arranged to interconnect the first and second side edges and to lie in an opposite second end of the pin-receiver slot in a location between the pivot axis and the first end edge associated with the pin-receiver slot, and the motion-transfer pin is arranged to lie in closely confronting relation to the first end edge associated with the pin-receiver slot upon arrival of the follower and the rolling cart stabilizer at the unfolded front position associated with the expanded use mode of the compact collapsible stroller and in closely confronting relation to the second end edge associated with the pin-receiver slot upon arrival of the follower and the rolling cart stabilizer at the folded front position associated with the compact collapsed storage mode of the compact collapsible stroller. 16. The compact collapsible stroller of claim 8, the follower of the inverse cam includes a follower plate formed to include the motion-transfer slot and the motion-transfer pin is arranged to extend into and move in the pin-receiver slot formed in the base member and to extend through and move in the motion-transfer slot formed in the follower plate. 17. The compact collapsible stroller of claim 16, wherein the pin mover includes a first pin-motion plate formed to include a motion-inducement slot and arranged to locate the follower plate between the base member and the first pin-motion plate and the motion-transfer pin is arranged to extend through and move in the motion-inducement slot. 18. The compact collapsible stroller of claim 17, wherein the pin-receiver slot is substantially straight and each of the motion-transfer and motion-inducement slots is curved. 19. The compact collapsible stroller of claim 17, wherein each of the motion-transfer and motion-inducement slots is curved.