Does the Knowledge part include memories?
It would be very interesting starting at 6 with the knowledge I understand and the experiences I have gone through. I would definitely do things differently. But also, what you once knew as your life now becomes your "Past Life", as you are now in your "Present Life" which is a 6 year old kid who has recounts of memories not relating to what you are experiencing now.
I asked about memories because holding those memories of your "Past Life" sounds similar to how children in our current reality do recount memories of a "Past Life" and some even can recount the exact places and people of their past experiences.
But then, does the knowledge part include everything you understand about reality, including the things 6 year old kids don't really understand yet, such as how human reproduction works?