What you need:
- One (clean!) pair of tights
- Two fistfuls of dried rice (or lentils)
- One needle
- Thread (the same colour as the tights)
Step 1: Cut the toe off the tights. This will act as the bag.
Step 2: Turn inside-out and pin the open edges together.
Step 3: Sew these edges, apart from a gap (to allow enough room to fill with the dry mix).
Step 4: Turn the bag the correct way around (outside-in) and fill most of the way with the dried rice (leave a little bit of space so that the finished product can still be squished.
Step 5: Sew up the gap.
Alternatively, you could make square ones like these from craftelf.com, just click on the picture below to link to the page: