Hopefully, the experience gave them a glimpse into a different time, and an appreciation of the resourcefulness shared by most humans, even if we choose to never use it. Perhaps that meaning was infused into their "treasures" from Robbins Crossing.
Do you have something of little monetary value that carries meaning? Sure, there are photos, and now we have tweets and posts that offer fleeting thoughts, but sometimes the meanings are hidden and difficult to quantify. I have a collar from Shasta, a Siberian Husky that was my nearly constant companion for 13 years. It even smells like her (a little), and I don't think there will ever come a time when I will willingly discard it. It isn't magical, nor do I believe that it carries any supernatural "spirit". It just makes me both happy and sad, and that is enough. My guitar case is covered in stickers that reflect places, times, and sentiments that are meaningful to me, and my bulletin board is awash in pins from over the years.
Can you find something to give away that doesn't cost anything, yet is priceless?