Too much naval contemplation. If it had a shred of utility, it wouldn't be so laughable.

Erm you might not be able to see Radio waves but in the 300MHz to 300GHz frequencies you can certainly feel them, they will burn you alive, so they most certainly ARE tangible.

@LenHazell53 Yes, but i was not talking about amplified radio waves.

Dreams do exists, they are measurable activity with in the brain of the sleeper.

LOL, IF you're talking about the 'number 2' as per what we often teach our younger children to call defecating, then to us it is definitely not something we'd have as a tangible (???) thing by any means, BUT little ones seem to think that it is, often, a 'plaything' LOL.
Nothing worse than finding a child smearing themselves and everything within reach with their new found 'plaything' is there?

The concept of two exists, when the concept is applied to any two objects to recognise them as such it becomes a property of those objects.
There is no physical/tangible thing identifiable as "2" but the concept can be represented as a written numeral, that is as near to existence as it can get.

Just trying to see if the atheist argument is still air tight
. It is

"Tang-able"; can be made into a drink for astronauts.

[en.wikipedia.org]