This is a really cool centerpiece idea. If you want something that looks really great but you don't want to spend a lot of money or time on it, then this might be the answer. Start off with a candle holder, and then glue a ring of clothespins around the top. Inside, you can stuff some grass just to give it a bit more of an Easter vibe. Do the same at the base of the candle holder.
If you want to take it a step further, then you can wrap your clothespin ring in twine or even lightly brush it with white paint or stain to give it a rustic look.