Have you ever tried any of the Dr. Lam Tai Chi videos? My husband does Tai Chi (he's... kinda scary and hardcore about it! XD) but started with those after he'd herniated some disks.
It took a long, long time and I remember getting so annoyed at having to go to the allergist's office every week for them. I convinced them to let me give them to myself and did for about two years, though I'm not sure they'd let people (let alone a ten-year-old!) do that anymore. :\