Wow, it seems I remember a number of songs; I just sang one to my partner:

Sung to the tune of Anchors Aweigh

Our kid's away, Thank God!
Our kid's awa-a-a-y
We sent him off to camp
At fifty bucks a da-ay

Though it's a lot to pay
We'll make no fuss,
If we complain
Then they might
Send him back,
Send him back,
To us!