We generally sing this at the end of our sessions.

Intro: Ish Ash Osh.

Link your hands together
A circle we make;
This bond of our friendship
No power can break.
Let's all sing together
In one mighty [or merry] throng;
Should any be weary
We'll help them along;
Should any be weary
We'll help them along!

and finish with:
Ish Ash Osh - PEACE!