My 5th grade students made coil pots for their clay project this year. I showed them a variety of ways to build with coils, and then let them make their coil pot however they wanted. Some of them turned out really nicely! Here are a few examples:
This one is a flower:
This one is a dolphin:
I like the openings in this one. It would make a nice candle holder:
This one has some really intricate swirls: