This is so funny as I had not played in years and then on a drive this weekend I taught it as I remembered it to my friends kids and the chant is different than everybody's. We slab both hands on knees, then clap, then snap right fingers then snap left fingers to a rythemic beat and sing... Concentration, Elimination, starting with names of ...   name subject like zoo animals.

You always say the words on the snaps. If you repeat or stumble you are out.

2nd version same chant you can repeat from the first word and then add yours to the end to see who can remember them all.

zebra, zebra bear, zebra bear elephant, zebra bear elephant kangeroo, etc.