Thanks for all of the positive comments...I will keep you posted as they mature.
Of course now the sand isn't sticking on them...I took these shots right after they arrived and I think sand was a new thing for them. Now they just do a little flick to get the sand off if it gets on them. I do think they really like the sand overall. They are always moving the sand around and "working" it looking for food. A few times a day right after a big meal they will wander off and completely burry themselves and rest for a while.