Have you tried sculpting at all yet?
All we can do is make use of the resources available to us. I lack all of the bits from those kits, but I do have this polymer clay which I've made use of for the past couple of years. The inverse, I imagine, is true for you, having the bits but not the clay, no?
All the same, the things you achieve with your models is something worth mentioning!
Thank you for the kind words, Andrew.