As far as i know, the concept is not interchangable Muppets. You take the Whatnot home with you, they make it in store while you wait. The features are being glued on with a hot glue gun. If you order online or through the mail the person making the Whatnot sees your design and puts the features on exactly where you said. Again, the concept isnt interchangable, but if they are breaking down costs of the parts individually instore (i guess to make it cheaper for some than $90 if they just want something really basic without much clothes and sell more of them) then i doubt there is anything to stop you just walking out with the parts rather than having them glued on. They might require a body purchase when buying accessories though so you are buying an actual puppet, we shall see!