You can drop off the items and take other items left by people for free. You do have to bring items if you want to take items. Pima County Library representatives are asking that you bring items small enough for a person to carry away, and only bring items that are “useable and appropriate for gifting.”
The Holiday Swap is presented by the Freecycle Network – an internet-based exchange network that started in Tucson in 2003, and has spread nationally. Freeycle lets people “go green” – members post stuff to give away that would’ve otherwise wound up in a landfill.