So I told him if he wants that he has to make it himself. I remember very well how unsatisfying it was from doing that the first time last year. Obviously we all assisted him with picking and he washed and cleaned the rosehips.
With stirring while cooking the rosehips he was still enthusiastic, but then the rosehips had to be pressed and strained. This is heavy and for a 6 year old almost undoable. Of course I finished this for him, but I did need some pauses in between. There must be a better way of doing this.
The yield is small compared to the waist.
The pulp was very thick, so I added some water and heated it up again to fill it up in glasses. After the rosehip pulp cooled again I keep it in the refrigerator.