I applaud you for giving your daughter this great opportunity for self-improvement and self-knowledge from such an early age, I wish more parents would have the vision to do something like this for their children.
BJJ is a great art for children to learn, and with this early start, if she keeps it up (based on that smile she looks like she enjoys it!) she'll be amazing by the time she becomes a teenager. Kudos!
RE: BJJ: Why my daughter takes JiuJitsu Classes.