The present disclosure describes methods and systems for combining Models of goods and services. At least some embodiments include a method that includes retrieving a first Model representing an object, a User controlling access to the first Model; retrieving a second Model representing a product offered by a Product Provider; combining, at the request of the User, the first and second Models, wherein the combining is performed as a first service, by a Service Provider, and wherein the first service comprises computing a simulated physical interaction between the object and the product; generating a representation of the simulated physical interaction; and presenting the representation to the User.