A stroller, comprising: a stroller frame; a plurality of wheels (14, 15) coupled to the stroller frame; a first seat coupled to the stroller frame; a first seat attachment housing disposed along a first portion of the stroller frame; a second seat attachment housing disposed along a second portion of the stroller frame; a first removable seat attachment adapter configured to be removably coupled to the first seat attachment housing; and a second removable seat attachment adapter configured to be removably coupled to the second seat attachment housing, wherein each of the first seat attachment housing and the second seat attachment housing comprise: an adapter receiving cavity configured to receive at least a portion of a respective one of the first and the second removable seat attachment adapters (84, 89); and a door disposed adjacent a top side of the respective seat attachment housing (1105, 1110) and configured to move from a closed configuration, preventing access to the adapter receiving cavity from the top side of the respective seat attachment adapter (84, 89), to an open configuration allowing access to the adapter receiving cavity from the top side of the respective seat attachment adapter (84, 89); and the stroller is characterized in that the door is slidably coupled to the respective seat attachment housing (1105, 1110) and is configured to slide from the closed configuration to the open configuration. a stroller frame; a plurality of wheels (14, 15) coupled to the stroller frame; a first seat coupled to the stroller frame; a first seat attachment housing disposed along a first portion of the stroller frame; a second seat attachment housing disposed along a second portion of the stroller frame; a first removable seat attachment adapter configured to be removably coupled to the first seat attachment housing; and a second removable seat attachment adapter configured to be removably coupled to the second seat attachment housing, wherein each of the first seat attachment housing and the second seat attachment housing comprise: an adapter receiving cavity configured to receive at least a portion of a respective one of the first and the second removable seat attachment adapters (84, 89); and a door disposed adjacent a top side of the respective seat attachment housing (1105, 1110) and configured to move from a closed configuration, preventing access to the adapter receiving cavity from the top side of the respective seat attachment adapter (84, 89), to an open configuration allowing access to the adapter receiving cavity from the top side of the respective seat attachment adapter (84, 89); and an adapter receiving cavity configured to receive at least a portion of a respective one of the first and the second removable seat attachment adapters (84, 89); and a door disposed adjacent a top side of the respective seat attachment housing (1105, 1110) and configured to move from a closed configuration, preventing access to the adapter receiving cavity from the top side of the respective seat attachment adapter (84, 89), to an open configuration allowing access to the adapter receiving cavity from the top side of the respective seat attachment adapter (84, 89); and the stroller is characterized in that the door is slidably coupled to the respective seat attachment housing (1105, 1110) and is configured to slide from the closed configuration to the open configuration.