My husband and I stayed in two different lodgings in Porto last April and June.
One was the albergue in the Porto train station. It’s called The Passenger Hostel.
We took the train from Lisbon and the hostel entrance is INSIDE the station. The location is perfect (near cathedral, food, attractions, etc). The rooms and bathrooms are all updated. The albergue is also quiet at night for sleeping. They also have laundry facilities (washer/dryers).
The room we were give was big enough for more than four people. There are also bunk rooms, but we were easing into our pilgrim life.
The other was the Porto Wine Hostel. This one is much smaller than the Passenger Hostal.How old is your daughter? I checked their website. However, they are posting no children. I liked the location for this one because of the park and free tours (with donation) near by. There is also an historic ‘student’s cafe’ around the corner. I believe it’s allied the Cafe Piolho D’ouro. It originally opened in 1909. It’s a historic gathering place for students, teachers, and political insurrectionists. Prices are reasonable and food yummy…but I digress.
My first choice would be the Passenger Hostel because of its location and the variety of evening activities that may be available.
Both can be reserved via Booking.com.