A self-propelling trolley assembly has a battery; a wheel driven by an electric motor that is powered by the battery; a rotation position or velocity sensor arranged to sense a rotation position or rotation velocity of the wheel; a user interface; and a control unit to affect a rotation of the wheel according to particular drive modes including a feedback assisted propulsion drive mode; a free-wheeling drive mode; and a rocking drive mode. The drive modes are implemented using different drive voltage patterns to the electric motor, and a stator of the electric motor has a number of stator poles that are not an integer multiple of a number of rotor poles and the stator poles are grouped into at least three magnetically and electrically identical subsets that are mounted sequentially around an angular direction of the electric motor.

A self-propelling trolley assembly has a battery; a wheel driven by an electric motor that is powered by the battery; a rotation position or velocity sensor arranged to sense a rotation position or rotation velocity of the wheel; a user interface; and a control unit to affect a rotation of the wheel according to particular drive modes including a feedback assisted propulsion drive mode; a free-wheeling drive mode; and a rocking drive mode. The drive modes are implemented using different drive voltage patterns to the electric motor, and a stator of the electric motor has a number of stator poles that are not an integer multiple of a number of rotor poles and the stator poles are grouped into at least three magnetically and electrically identical subsets that are mounted sequentially around an angular direction of the electric motor.

Systems and methods are disclosed for autonomously soothing babies. An example method may include receiving a first sound input from a microphone, processing the first sound input, determining a baby status based at least in part on the first sound input, determining an output action based at least in part on the baby status; and implementing the output action at the children's apparatus.

Systems and methods are disclosed for autonomously soothing babies. An example method may include receiving a first sound input from a microphone, processing the first sound input, determining a baby status based at least in part on the first sound input, determining an output action based at least in part on the baby status; and implementing the output action at the children's apparatus.

A child stroller includes: a frame; a plurality of wheels; a child-seat assembly configured to rock back-and-forth with respect to the frame; a rocker assembly secured to the child-seat assembly. The rocker assembly includes: (a) a plurality of legs, each leg defining an undersurface, each undersurface being arced; (b) a rocker base, the rocker base comprises an inner surface. The stroller is configured such that when the child-seat assembly rocks back-and-forth with respect to the frame, the legs rock back-and-forth upon the inner surface of the rocker base.

A child stroller includes: a frame; a plurality of wheels; a child-seat assembly configured to rock back-and-forth with respect to the frame; a rocker assembly secured to the child-seat assembly. The rocker assembly includes: (a) a plurality of legs, each leg defining an undersurface, each undersurface being arced; (b) a rocker base, the rocker base comprises an inner surface. The stroller is configured such that when the child-seat assembly rocks back-and-forth with respect to the frame, the legs rock back-and-forth upon the inner surface of the rocker base.

Systems and methods are disclosed for autonomously soothing babies. An example method may include receiving a first sound input from a microphone, processing the first sound input, determining a baby status based at least in part on the first sound input, determining an output action based at least in part on the baby status; and implementing the output action at the children's apparatus.

Systems and methods are disclosed for autonomously soothing babies. An example method may include receiving a first sound input from a microphone, processing the first sound input, determining a baby status based at least in part on the first sound input, determining an output action based at least in part on the baby status; and implementing the output action at the children's apparatus.

Systems and methods are disclosed for autonomously soothing babies. An example method may include receiving a first sound input from a microphone, processing the first sound input, determining a baby status based at least in part on the first sound input, determining an output action based at least in part on the baby status; and implementing the output action at the children's apparatus.

Systems and methods are disclosed for autonomously soothing babies. An example method may include receiving a first sound input from a microphone, processing the first sound input, determining a baby status based at least in part on the first sound input, determining an output action based at least in part on the baby status; and implementing the output action at the children's apparatus.