Losing my marbles

While sitting on the front step
It jumped out of my head
Another precious marble
Rolled down the garden bed
I bent down to retrieve it
And found some others there
I knew I'd lost my marbles
But I didn't really care

My marbles have been with me
Since I was a little lad
I played a zillion games with them
Played many with my dad
So thank you all my marbles
And the few that still remain
I will cherish all our moments
Till the end of my campaign

Had I never lost my marbles
I'd have never lived at all
So to all my long lost marbles
I've had such a bloody ball
If I'd never picked you up
Flicked you gently with my thumb
Life would have been so different
Would have been at best hum drum