Travel system having a child carrier with handle that extends and/or rotates

A child carrier configured to be removably coupled to a child carriage for pushing the child carrier, the child carrier comprising:

• a frame or body defining an opening that is configured to support a child therein;
• a handle coupled to the frame or body by a handle hub such that the handle is configured to rotate relative to the frame or body between a plurality of rotational positions, and the handle being configured to transition between an extended position and a retracted position relative to the frame or body;
• a handle extension lock that is configured to move between a locked position and an unlocked position to selectively lock the handle in the retracted and extended positions;
• and
• a handle extension stop that is disposed within the handle hub and is configured to move between 1) a blocking position that prevents the handle from moving from the retracted position to the extended position, regardless of a position of the handle extension lock, and 2) a released position in which the handle is permitted to move from the retracted position to the extended position while the handle extension lock is in the unlocked position.