Exactly, but I'm wondering if it's something a bit more conceptual too, and the word, "things", is supposed to make us arrive at that conclusion, when there's something else to it.
Looks like this one could be a good riddle too, since nobody got it in the first 10 minutes.
I'm wondering if the "holding in my hand" is supposed to give a false preconception of scale too. I mean you could hold atoms in you hand, or a bunch of thin six foot long metal rods - that are still the same size and shape.
Actually the palm reference - might be something to do with palmistry. He's not talking about lines? Features of fingerprints?
I know there is a particular trisecting characteristic of fingerprints, (a feature by which they are classified), and there's five individual fingers that are pretty much the same size and shape. I doubt you'd have ten on one print though, and your thumb is slightly larger for one thing, but this is the kind of conceptual "thing" you could count.
Either way, the fact there are five objects and five fingers makes me suspicious that there could be a relationship - especially with palmistry. But I don't know shit about palmistry except that it is shit.
Just thinking out loud ...