I believe the song you are looking for is "Little Play Soldiers". If memory serves me (and it seldom does)...

Two Little soldiers, their games are such fun
Each with his helmet and little toy gun
Pretending they're laying on a battlefield dead
Instead of tucked away safe in their beds.

Chorus: Little Play Soldiers, if only you knew
What kind of battles are waiting for you. A few of the remaining lines...

Little play soldiers, their games are such fun
Each with his helmet and little toy gun
Little play soldiers will never know why
We hug them and kiss them and then send them to die.

It was recorded by the Kingston Trio in the late 60's. I think it was on the "Nick,Bob,John" album. Hope that helps in your search.