In one example, a travel system has a child carriage and a child carrier that removably couples to the child carriage. The carriage has a frame and wheels attached thereto. The carrier has a frame or body that supports a child therein, a handle coupled to the frame or body, a handle rotation lock, and a handle extension lock. The handle extends, retracts, and rotates relative to the frame or body to different rotational positions. The handle rotation lock selectively locks the handle in each of the rotational positions, and the handle extension lock selective locks the handle in extended and retracted positions. The carrier can have (i) a rotation stop that selectively blocks rotation of the handle when the handle is extended and/or (ii) an extension stop that selectively blocks extension of the handle when the handle is in a position for hand carrying the carrier.