Can the Ridge be used with multiple children? The Ridge allows for a second child when using the piggyback attachment.PiggyBack for Ridge Related articles Can my baby sleep in Mamaroo? How much of the Mesa Max Infant Car Seat base needs to be in contact with my vehicle cushion? What infant car seat adapters are available for the Cruz? What is the difference between the Mesa and Mesa V2? What belts go under the tensioning plate?