Abstract: A child-resistant senior-friendly package and related methods are disclosed herein. A cardboard package has a container formed from a first cardboard sheet, a first wall extending between the proximal and distal ends, and a second wall opposing the first wall and extending between the proximal and distal ends, a first recess in one of the first wall or the second wall, and a first protrusion extending inwardly from the one of the first wall or the second wall, the first protrusion positioned proximal of the first recess. The cardboard package has a tray formed from a second cardboard sheet, the tray having a first resilient member in one of a first wall or a second wall, the first resilient member shaped and positioned to removably engage the first protrusion in the container, whereby the tray is maintained in a closed position.