The first stage is to sing it with students holding hands and walking in a circle, then changing direction on the word “boom.”
The second is to sing the song in your head and keep the beat with your feet and again change direction on the word “boom.” This is great for kindergarten and first grade.
The third is to sing it as a three-part canon with three circles. The circles start walking in the same direction as they start to sing, and then change direction at different times as they each get to the “Boom.”
“Sally go round the sun
Sally go round the moon
Sally go round the chimney pot
Every afternoon. Boom!”