dear colleague,
If you would look up everything that has been written on scoliosis in the paediatric part of this forum, that should give you some ideas.
And I suggest you start reading the Scoliosis Lots of very good info in this free access biomed journal
good luck
do not forget to try to make the exercises fun, as in age appropriate Try finding out the dance style and making that into exercises if possible.
Esther