RE: Restaurants. There is a restaurant at the resort, near the golf course. It was small, and had a bar area. High chairs were available. We had breakfast there a few mornings and ate dinner there one night. There is no kids' menu for breakfast, but there is one for dinner. At breakfast, my 7-year old DS just split a plate with one of the adults and my 2-year old just had fruit.
RE: Pools. There is a central pool area. We spent one morning there. It was not crowded, and there were plenty of lounge chairs around. It is behind the main building, where you check-in. There are rest rooms close by and the Marketplace restaurant/store is also nearby. There is a main pool here, as well as a separate fountain/sprinkler area for little ones, and a separate kiddie pool. The kiddie pool was not filled until about noon. It needed to be cleaned - it was not filthy, but there were a few leaves floating around. It was zero-depth entry, with several spouts around the perimeter, shooting water. My two-year old DS loved it. There was also a pool behind our building, with a nearby hot tub. Did not use the hot tub, only heard about it. Plenty of lounge chairs here, too. The pools have steps that lead into them. When we were in the main pool, and in the pool behind our building, my DS just hung around the steps and splashed there. There was still plenty of room for people to use the steps even while he was playing there. Both pool areas had shaded sections, there were plenty of trees around. The temperature of the water was fine, too.
RE: Grounds. The resort was beautiful. Nicely kept up. We rented a boat and took a ride out on the lake - they have life vests available. Every morning, there was a list of kids' activities placed outside our door. To be honest, I didn't pay attention to what was on the list, only that it was delivered. There were surrey bikes available for rent, too. I don't remember if they had regular bikes for rent.
So, other than the pools, I'm not sure what else would be on the grounds for 3-year olds. We spent our time in the WDW parks and the resort pools. There were lots of families at the resort, though.