My DD had portage from the age of 18 months until she started nursery. She (Sheila) used to come once a week and basically gave me guidance in helping my DD to do the 'developmental' skills.
When Sheila first came my DD was not walking/talking, but the first task was to try to get my DD walking.
By the next week, my DD was walking (not everywhere obviously, but moving around more than ever before).
They focus on the developmental skills (walking, talking, fine/gross motor skills).
It was never a chore for my DD to have these challenges set for her and it was such an achievement when she reached that goal that other children met so easily.
Now my DD, still with the same genetic condition, goes to mainstream school (with help), walks, talks, swims, dances - everything that a normal 6 year old does.
I hope you don't mind me asking, and don't answer if you don't want to, but why is your DD seeing a portage worker?
I always knew there was something 'not quite right' with my DD (youngest of 3 - elder sister and brother).
Now she is just fantastic.