This probably belongs in the "Tip & Techniques" forum, but since it crops up in here a lot, I thought I'd post a quick & dirty Sandbag tutorial for the Nuggets..
Anyone have any other methods, jump on in..
Anyway, this's one method of making sandbags..
Get some Sculpey or any oven-hardening clay and roll out a chunk about a 1/2" in diameter.
Cut it into slices:
Roll the slices out a bit into "bag" shapes and lay them end-to-end with a little overlap:
Keep layering them, with each layer double the width of the next one. If you're going 4-high, there should be 4 rows on the bottom, then the next one 3 rows, then 2, then one.. Place the bags over-lapping the row under it by half... That is, each bag is resting on two bags of the previous rows, like bricks. (Yeah, I know what it looks like, shaddup...)
Add a "Cloth" texture by pressing down on each bag with a fabric-wrapped finger:
Fire the bags in a 275-degree oven (for Sculpey) 30 minutes for each layer and paint when cool.
Now if you need a lot of bags, rather than building the whole thing one bag at a time, you can cast a section in plaster and lay them together, tying them in with some ground material..