You need this:

- 15-20 pebbles (decolouring)
- 2 rolls of deco wire in silver (craft shop)
- Glue gun and hot glue
That's how it works:
1. Wrap the pebble tightly with wire using both rollers at the same time. On the underside, additionally fix the wire with hot glue.
2. Twist both wires together.
3. Now repeat the process for the next pebble.