Your eggreg stroller can be converted into a tandem with the use of the tandem s shaped adaptors the adaptors are easily fitted which allow you to use your stroller for your newborn and toddler your already purchased full size carrycot and seat unit attach to the adaptors an additional full size tandem seat unit suitable from 6 months can also be added when your baby has outgrown the carrycot if you are expecting twins the eggreg can be purchased as a twin option purchase the stroll