I was down in Ventura a few weekends ago, and had a very successful morning beachcombing. My husband and I found four sand dollars in perfect condition! We went to a spot where all of the birds were hanging out, thinking that might indicate lots of goodies washing in, and it worked!
But I had such fun, working quickly and loosely. And I love the texture of the charcoal on the paper:
But if you prefer my tighter, more detailed drawings—fear not! Here's what's on my drawing board at the moment: one of the sand dollars drawn at 2x life-size (I've cranked up the contrast to make it easier to see the lighter parts.) :