...would like something close to both the kiddie pool (zero entry pool, right?) and the playground... a view of the lake with the FIREWORKS!... I've heard 4 and 5 are newer, but also a bit farther, which I'd rather not go. I also heard they are new construction, which I'd rather avoid too.
Brian's right, choose what matters the most to you. It's not possible to get ALL of these in a single room. The buildings encircle a lake.
Puerto de Leon is on the northwest side of the lake, with the lobby and many of the recreation rooms. It has fewer rooms and it's in front of the zero entry pool #1. Rooms have either a northwest parking lot & possibly fireworks view OR a southeast pool/lake view.
Counterclockwise, Torre de la Tierra is southwest of the lake. Rooms either have a parking lot/Caribbean Beach Resort view OR a northeast lake view. It's a short walk to the rec bldg & pool #1 or to the playground in back.
Continuing around the lake counterclockwise, Torre del Viento is south of the lake and it's V-shaped with the V pointing due north toward the lake. Rooms have either a lake/fireworks view to the northwest, a lake/resort view to the northeast OR a parking lot/golf view to the south. It's a short walk to the playground, volleyball or pool #2 with the slide.
Next comes Torre del Mar, southeast of the lake. Rooms have a lake/pool/fireworks view OR a parking lot/landscaping view. Pool #2 is directly in back of this bldg.
Starting over again at the lobby/recreation bldg (Puerto de Leon) and going clockwise, Torre del Cielo is on the north side of the lake and faces it due south. Rooms have either a parking lot/sideways fireworks view OR a lake view. Short walk to pool #1.
Further clockwise is Torre de la Luna, northeast of the lake. It's V-shaped with the V pointing northeast away from the lake. A future lakeside pool area #3 is under construction in the middle of the V but currently, its rooms are the furthest from any pool. Rooms have either a south/southwest lake view OR a parking lot/woods/possibly sideways fireworks view.
Next, the final timeshare building is under construction, Torre del Sol, due east of the lake. It will be next door to the new Wyndham Hotel & Spa, also under construction. Both this timeshare building and the hotel will have additional new lakeside pool areas.
Nothing is too far to walk at this resort, truly!!! Until the final buildings are completed, there's an interruption in the sidewalk that encircles the lake and connects all of the buildings. So it can feel like a long walk from Torre de la Luna, around the lake to pool #2 with the slide. But there are really no "bad" locations. And only the upper floors have an actual fireworks view so if you're on a lower floor or facing the wrong direction, you may still go up the elevators and see fireworks from a corridor window in some buildings.
Since you'll have a toddler and you want the zero entry pool and playground nearby, and the fireworks view matters to you, I'd suggest requesting a "fireworks view near the zero entry pool", and expect a parking lot view in the daytime. That's just me. HTH!