These five playgrounds are evenly distributed around the park and all nearby one of the entrances to minimize trekking and maximize playing:
Garfield Tot Lot (for toddlers): On your left immediately after you enter at Prospect Park West and Garfield Place in Park Slope
Harmony Playground: On your left when you enter the park at Prospect Park West and 11st St in Park Slope
Imagination Playground: Enter the park at Ocean Ave and Lincoln Road in Prospect Lefferts Gardens and follow the first path going left (you should be east of East Drive) for several minutes, or enter at Parkside Ave and Ocean Ave in Prospect Lefferts Gardens/Prospect Park South and follow the first path right (east of East Drive) for several minutes
Lincoln Road Playground: On your right immediately after you enter at Ocean Ave and Lincoln Road in Prospect Lefferts Gardens
Third St Playground: Enter the park at Prospect Park West and 3rd St in Park Slope; any path from the entrance should lead you to this playground, which backs up against West Drive
Vanderbilt Playground: Enter the park at Prospect Park Southwest and Vanderbilt St in Windsor Terrace, take the first path on your left and you will see it right away.
You should be able to identify each spot by its official name, both onsite (look for a plaque with the name inside a leaf shape) and on GPS maps. They’re all well maintained with the expected slides and swing sets along with the occasional fountain in the shape of a dragon or giant harp for local flavor.
Harder to find and to label but very worth checking out is the Zucker Natural Exploration Area, a play and education site constructed entirely from trees felled by Superstorm Sandy in 2012. Enter the park at Grand Army Plaza and take East Drive south until you see this open-air path on your left. Alternatively, enter at the corner of Flatbush Ave and Empire Blvd (near the Brooklyn Botanic Gardens) and take East Drive North to find the Natural Exploration Area on your right. Prepare for a leisurely fifteen-minute walk.
Now officially part of the park but really down a side street in Prospect Park South is the Stewart Playground. Enter at the corner of Parade Place and Crooke Ave.