I'm a thousand-legged worm

All the kids except one form a circle, with the one remaining kid in the centre. As the verse is sung, the circle moves round in one direction and the lone kid in the other. When they reach the chorus, both the circle and the single kid stop, and she faces whoever they are opposite and they BOTH hop on one leg while they (and everyone else) sing the chorus. Then the kid who was selected joins the first kid in the centre and everyone carries on singing, moving round in opposite directions. At the end of the repeat, BOTH kids choose someone to hop in front of, and the song carries on thus, the inner circle increasing and the outer decreasing until everyone is hopping!

Click to stop and start the music

*secondary music link : left-click here if you can't see the control box above.

I'm a thousand-legged worm and I've lost a leg
Has anyone seen that leg of mine?
If it can't be found I will have to hop around
On the other nine-hundred-and-ninety-nine

(Chorus) Ninety Nine! Ninety Nine!
On the other nine-hundred-and-ninety-nine!
If it can't be found I will have to hop around
On the other nine-hundred-and-ninety-nine!

(Repeat until everyone has joined in the hopping)