I think there are drama schools for youngsters which do a bit of everything, but they're few and far between so you might have look outside your local area. The famous drama schools like RADA etc. tend to do singing, dancing and acting (a bit like 'Fame'!), but unless you're loaded and confident she could make it, I'm not sure it's worth remortgaging your house for!
When she goes to high school, she might be able to take Drama or Dance as a GCSE depending if the school runs them, and then maybe get involved in school productions etc. Do you have an Am-Dram group locally she could join for now maybe? I'm sure they must do productions with child actors too?