I've actually had similar thoughts about this, basically an objects becomes another object based on context, in your case you're "adding" elements to the object

I've actually had similar thoughts about this, basically an objects becomes another object based on context, in your case you're "adding" elements to the object, however I had been thinking that just simply creating a bunch of objects with different properties, and whenever it is in a state that it can become that object (due to an action on it), it automatically is typecast to that type of object and referred to as that from there forward, I've never tried it, but it was just a thought. Interesting read.