After reading several other questions surrounding the mechanics of the Borg assimilating children and pregnant women, with the use of maturation chambers to mature the child to a point where they are useful, my question is simply why assimilate children?
It takes more effort to add them to the collective than it does assimilating an adult, its unlikely they add anything unique to the collective by being raised in a maturation chamber and they require feeding and sustaining while not returning anything for the period of their maturation.
Surely it would be simpler for the Borg to reduce children to a nutritional goo for feeding to the rest of the Borg, and move on to the next adult in line?