My sister really enjoys going to these classes. Her teacher / instructor Shannon obviously knows what she is doing, and loves teaching.
I wish the classes were a bit more focused on scene work than exercises, but I've learned a lot there and enjoyed the talent that existed in the class. They put on top notch productions too!
CYT is a great little acting group that teaches your kid to sing, dance, how to be ready for a addition. And they also have beginning classes for your little ones.