I'm another geezer here also.
We cover the whole gamut of ages from 13 to prehistoric. I doubt that anybody can give you an average. Me? I'm a geezer.
I think the regular users tend to be a bit older, maybe average around middle aged, but there are younger ones too. I just turned 14 myself.
Well I am 28. I have seen people of all ages here.
I'm 15, but we have people from every age
Every time I log in, the average age doubles.
I think I remember seeing a Tyrannosaurus Rex floating on an iceberg.
I'm 73, which is nearly 5x15!