My 8yo son has been attending courses for several months at Phoenix.  Excellent courses and content!  Excellent instructors who do a good job of being patient and finding ways to push the child’s physical limits!  There is a great community vibe every time we’re at Phoenix.  And there is no dragging the kid to go (like soccer practice), my son would go every day if possible. The only downside for us is the drive (about 30 minutes) but still fully worth it!