A wheeled platform has a base, a plurality of wheels, and a power supply. A connector extends from the wheeled platform. A motor assembly has at least one motor mounted on the connector to couple with a conveyance. A controller assembly steers the conveyance. The base includes an upper surface for supporting an operator. The base forms a wheel assembly for holding the wheels. The power supply sends power to the motor assembly through the control assembly to drive the conveyance.

A baby stroller capable of being pushed and pulled comprises: a frame provided with a first locking slot and a second locking slot; a handlebar rotatably disposed on the frame and provided with a third locking slot; and a locking mechanism comprising an unlocking part, a driving part and a locking part, wherein the locking part has an end disposed in the third locking slot and an end locked in the first locking slot or the second locking slot; the unlocking part is able to drive, through the driving part, the locking part to designate from the first locking slot or the second locking slot to unlock the handlebar. The handlebar of the baby stroller is rotatably connected to the frame, such that the handlebar can be located close to front wheels or rear wheels to allow the baby stroller to be pushed or pulled for use.