Just got back from Poly 8 night stay. They had some games at the pools, and both pools have a very shallow end. The quiet pool has little fountains with water gushing up in a shallow area I think a toddler would love. We like first floor, so we had duck visitors every day. There are movies on the lawn most nights. It's so nice and quiet now! You can't go wrong. Seeing the castle and space mountain from the beach is always special.
I have done split stays, but I really love just settling in somewhere. It always seems like in a split stay, one stay is better, and I hate when the first stay is the best!