Stroller and method of folding a stroller

A collapsible cart for children (1; 100), having a structure of folding trolley between an extended configuration and a collapsed configuration, and interlocks the first and second (70R, 70L; 112, 112), mounted on the structure to block the structure in the extended configuration, the structure having a grab bar (20; 104) connected to parts of the structure, connected to the locking devices first and second (70R, 70L; 112, 112), further comprising the cart an actuator fold (93; 200) mounted on the structure of the cart, in a remote position with respect to the locking devices first and second (70R, 70L; 112, 112), the actuator fold (93, 200) comprising: a first movable member (94R, 220) operatively connected to the first locking device (70R; 112) to unlock the first locking device (70R; 112), the first movable member (94R, 220), movable between a position deactivated and an activated position; yun second movable member (94L; 240) operatively connected to the second locking device (70L; 112) to unlock the second locking device (70L; 112), the second movable member (94L; 240), movable between a position deactivated and activated position wherein the first movable member (94R, 220) and the second movable member (94L, 240) are operating independently, and are positioned mutually adjacent, for one-hand operation.