No question about it, Play-Doh as long as it's fresh. It loses it's taste as it ages.
I agree though, kids love to see what's in there even if they don't take anything. I think it can also teach them a lot about trading fairly. When we took our granddaughter caching in AZ the second day, she actually chose some of her own trinkets before we left to trade without it even being suggested to her and pondered at each cache if the trade was fair. That's a value some adult cachers could learn.
Gotta disagree with you there Dave . . . no doubt in my mind. The firetruck . . . especially if it is a Matchbox fire truck and not some cheap knock off.
"Courage is not the absence of fear, but the realization that there is something more important than fear."