A card-holding component. The card-holding component comprises a main body that includes a base and a card-holding portion. The card-holding portion having a geometry of a segment of a circle with an arcuate edge. The card-holding component also comprises a multiplicity of peripheral slots arranged to open on the arcuate edge of the card-holding portion. Additionally, the card-holding component comprises a coupling notch having a width that substantially matches a thickness of the main body.