What I also wanted to add is a common missunderstanding about tasks: In
the past I have seen frequently that people try hard to fit one package
into one task. That's totally not intended. One single package can
reside in several tasks for sure. So if we are not sure whether foo fits
into age-0-3 or age-3-6 - just put it into both tasks if there might be
some use for children in both (or more) ages.