Within six months the baby can't hold, so more suitable for horizontal and can't lie flat trolley use until the baby is six months or more is desirable, a baby cart around to about two years, mainly in accordance with the load of the standard, generic, standard nine to 15 kg. But some parents let their children sit carts, security will have to pay more attention. General BARROW approximately 4-5 years, if in the case of damaged, their exhausted, babies also can be given to family and friends. Proper maintenance and correct use, to ensure that the trolleys can safely allow second children continue to be used.