I recently posted about some second grade "Mud Pony" sculpture projects. Some of the students chose to sculpt things other than horses. There are a few examples below:
I didn't encourage snakes since I thought just making a coil was a little simple for 2nd grade, but this pink and orange snake was pretty cute. Students who did make snakes had to at least make them more interesting than a straight coil.
Other sculpture choices were landforms such as islands or volcanoes, a table with a meal on top, a guitar, and a flower.