Welcome QuiltAddiction and StenthPatric!
Quilt Addiction ... Great idea. You've got your idea and with a few more googles, I'm sure you'll find some great Dr. Spock pics to spark the idea even more. Enjoy your time away and happy sketching!
StenthPatric ... As you've noticed, these quilts are "one-of-a-kinds". The How To is basically take an idea or a picture and then just get creative. Some are spin-offs from other patterns. Some are self-developed paper pieced ideas. Some ... well, they just happen. So find something you'd like to create, and let the creative juices start flowing!