A point of sale computer system that allows a customer to select and consummate a sale himself. The system may include graphics storage media configured to store two- and three-dimensional graphics data relating to the sale, as well as business rules storage media, configured to store business rules that specify the graphics that should be displayed during the selection and consummation process based on input received from the customer. The technology allows a presentation to be made to the customer that is entertaining and that maintains the attention of the customer throughout the sale selection and consummation process.