Look at research by  Ron Rapee, Prof at Macquarie University

Below is a link to programmes run by Macquarie University

http://www.mq.edu.au/about/campus-services-and-facilities/hospital-and-clinics/centre-for-emotional-health-clinic/programs-for-children-and-teenagers

Thanks Jill.

Narrative therapy techniques are really useful with children - Read Playful Solutions to Serious Problems by Epston and White. The component of CBT for anxiety that appears to have the strongest outcomes is exposure. This can be challenging for parents to support their children with, and very often it is their accomodation to the anxiety that is preventing exposure from taking place, so a family-based approach that includes the parents is recommended. Again, narrative techniques can be useful when it comes to engaging family with the solution. 

Regarding the BAI - there's a youth version the BAI-Y that may be more appropriate than the adult version in terms of its language. 

http://www.narrativeapproaches.com/?mbt_book=playful-approaches-to-serious-problems 

Thanks a lot Miriam. This is actually helpful.

Behavioral treatments have generally proven more helpful than non-behavioral treatments for children and adolescents.

The BAI is ok, but seems to load fairly heavily on physiological arousal (e.g., panic) symptoms.  Alternatives include the Revised Child Anxiety and Depression Scale, the Screen for Child Anxiety Related Emotional Disorders, and the Multidimensional Anxiety Scale for Children. 

http://scholar.harvard.edu/jweisz/files/1987c.pdf

http://www.childfirst.ucla.edu/2005%20RCADS%20Clinical%20(Chorpita,%20Moffitt,%20Gray).pdf

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Thanks a lot for the insight David. Shall definitely incorporate your suggestions.

Thanks a lot in helping my writing.

After 6 or 7, I'd use hypnosis. Children have great imaginations making hypnosis quite effective. As our imaginations subside and the left brain takes over, hypnosis becomes difficult. Of course, there are exceptions.