Yesterday I volunteered for four hours selling tickets at the LVIS fair in East Hampton. My booth was right near a bunch of kids rides. Pony rides, giant slides, rock climbing, and snow cones.
Sitting there I watched a fascinating phenomenon. As kids bought tickets, I would first give them the tickets and then count out their change. Half the time the kids were running off before I could even give them their change. I had to yell at them to get them back to the booth.
The desire for one more pony ride or snow cone was so great they'd leave $15 in change behind.
Interesting to see considering what sometimes happens in online auctions where people bid over the retail cost of an item.