- Attach a climbing knot to a carabiner (as shown in the image at the bottom of this tip).
- The climbing knot at the end of the chain denotes the "null object" signifying the end, or tail, of the list.
- The first attached carabiner is the first node, head, in the linked list.
- Attach additional carabiners to demonstrate adding nodes.
- You can tape slips of paper to each carabiner to serve as data.
- The image below represents a singly linked list.
