My pods are based on the form of a pea pod, though the peas in the pod obviously don't quite match. One of the first pieces I made is now owned by someone who has a large family including several foster children. She compared the different peas in the pod to the different members of her family. I like this comparison.
I also am interested by interior spaces, partially hidden, and by the contrast of interior and exterior surfaces in seed pods of all kinds including peas, peppers, milkweed pods and others.