Graeme is spot on. What they are are doodads that you make with caramel. Essentially, you take caramel, cool it slightly, then dip a spoon in the mixture. You then make little designs by flicking the spoon over a sheet pan lined with parchment paper or better yet, a silpat silicone baking mat. Once they harden you simply peel away the design and use as desired.
In the picture, we made the flan, and then placed the doodads on top of it. A bit of overkill I think (it wasn't my idea), but it did build height on the dish, one of the things you try to do while plating for presentation.
Alan