VIS Games This package contains 17 different types of playground objects (PBR).Just drag the prefabs into your scene and arrange them as you like.
You may also want to have a look at the example scene that contains all the prefabs.Textures: Albedo, Normal Maskmap (work with Unity Standard Shader and Unity 2018 HDRP Lit-Shader
All single parts using about 150-4500 Polygons.
The package now supports Unity 3,4,5 and 2018.