We stayed last Tuesday and Wednesday nights at the POP Century. I saw the children's playground. It was right near to the parking lot for the 70's /80's buildings.
We arrived there later at night about 9pm. Check in was really smooth and our check in guy was quite fun.
We didn't actually spend much time at the resort, because we wanted to go to early opening at Epcot the next day and didn't return until about 9pm again.
The room was very nice, we had 4 people, 2-16yr girls and my husband any myself. The girls went for a late night swim in the bowling pin pool.
We had one breakfast in the restaurant there. I had french toast and it was very very good. They put some kind of crumbly topping on it.
We had a rental car so we drove from park to park (4 parks in one day). The friends we went with used the bus to go to Magic Kingdom and said it was fine. Since they didn't get to ride the Monorail to Magic Kingdom, I took the bus back to the POP Century resort with the girls after the fireworks while the others took the rental car.
We were back at the resort at least 20 minutes before the ones with the car, it was standing room only in the bus though and it sure seemed like we drove a long ways while we were standing.
All in all it was a very positive experience for our very first ever time on-site of Disney property.