I looked at a few playground game sites..no luck.
Saying "Conker, take 1" would amuse me a lot too.
Here's the best I could come up with.

*****
http://www.mldb.org/song-169904-virgin.html

And I think that I wish I was virgin
And I smile and I think of you
And my first, very first entry
Clumsy and romantic
My special mix in you
Clumsy like the first step
Clumsy like the first conker off the tree
And romantic, like the wind that cuts your hair
And romantic, like the glass that holds your drink
Clumsy and romantic
My special mix in you

And I think that I wish I was young
And I smile and I think of you
And my first, very first true kiss
Defensive and so coy
Defensive like the jacket that holds your weight
Defensive like the hat that holds you hair
And coy like the first kiss, the kiss that first made you coy
And coy like the tears, the tears that made you coy
So gentle, so gentle it made you strong
It made you strong, like the first kiss
Clumsy and romantic, so gentle it made you strong
Clumsy and romantic, the kiss that made you strong
****
A Life in Pictures: The Conker Tree
   
When I last walked down this lane
I was just a boy,
The puddles were much deeper then,
The muddy water splashing
With adventure
And a drowned mouse
Beyond all our attempts at revival.
The blossom and the scent of wet nettles
Have caught me now,
But then it was the stingers and the frantic search
For dock leaves, to stop the hurt.

And finally the conker tree where Peter fell.
The biggest ones are at the top
He always said.
He was the best of us at climbing
But then the crash of falling branches,
Leaf and conker cascading on his broken
Young body, in the lane.

The ambulance came with just a bell jangling
And on a bike, a policeman
Looking stern, writing names down
Seeing we were all OK...
Except Peter.

So I'm walking down the lane after fifty years
But Peter isn't here, just the same conker tree
Which somehow seems much larger
And I feel lonely
Just thinking of the fifty years he missed
And all for conkers,
Which were never any bigger at the top.


Footnote

Conker = horse chestnut
This poem is about the loss of a childhood friend and also about the loss of childhood.

Patrick Ladbrooke
http://www.poemhunter.com/poem/a-life-in-pictures-the-conker-tree/