An embodiment of the invention includes receiving a request to purchase a product from a vending machine. At least one question to be output is determined, and the determined question is output.An interface is provided which that permits at least one answer to the at least one question to be entered by a customer. At least one answer to the at least one question is received via the interface.Based on the answer, a level of access to one or more products available for sale by the vending machine is determined. A product is provided if the level of access permits providing of a product.