The present disclosure relates to a stroller with a secondary attachment mechanism to facilitate the attachment of various structures to the stroller. In one embodiment, the secondary attachment mechanism may comprise an infant car seat adapter. In another embodiment, the secondary attachment may comprise a basket. The present disclosure also relates to a basket for use in an expandable stroller system. The expandable stroller system comprises an expandable base. The basket attaches to the expandable stroller system and expands with the expandable base of the stroller system advantageously providing additional storage space.