No, not noodles but Nuudles. They are basically packing peanuts that are made from cornstarch. I remember discovering them years ago while teaching. They came in, well a package.
While my students were using them somehow water or glue got on them and they started to disintegrate. A wonderful new discovery! Come to find out they are now marketing them(probably have been for years) I just happened across them at the local craft store. Anyways with just the tiniest bit of water they will stick together and you can create what have you.
The boys thought it was great fun, they especially liked getting them really wet and watching then melt.
So when you have had enough of the art they can be washed down the drain or thrown into the garden. Pretty neat, huh?