All the best for the venture Pete.
What you really need is a geocaching song to introduce it. Here's one I wrote a couple of years ago (everyone should know the tune

)
Geocacher SongI'm a geocacher, I'm okay.
I sleep all night and I cache all day.
Cachers : He's a geocacher, he's okay.
He sleeps all night and he caches all day.
I put 'em in trees, and under rocks.
I hide them in ivy.
On Wednesdays I go shoppin'
And buy Tupperware in threes.
Cachers: He puts 'em in trees, and under rocks.
He hides them in ivy.
On Wednesdays he goes shopping
And buys Tupperware in threes.
Chorus He's a geocacher. He's okay.
He sleeps all night and he caches all day.
I wear bright clothes. I cache at night.
I like to frighten cats.
I wear my head torch round my waist
And look a proper prat.
Cachers : He wears bright clothes. Caches at night.
He likes to frighten cats.
He wears his head torch round his waist
And looks a proper prat.
Chorus He's a geocacher. He's okay.
He sleeps all night and he caches all day.
I hide micros. Small nano's too,
Male torso's and a Bat.
I wish I'd been a techie
Just like the great Web Rat.
Cachers : He hides micros. Small nano's too,
Male torso's and a Bat?!..........
Chorus He's a geocacher. He's okay.
He sleeps all night and he caches all day.