Need more space? Got a dingy unfinished room? You can quickly transform that space into something usable and comfortable. We take a closer look at it as well as some alternatives. Classroom Wall Decor Best 25 Preschool Classroom Decor Ideas On Pinterest Preschool Creative is one way to turn a dingy unfinished room into additional space that's attractive and comfortable. It does this by applying their expertise in building science and system design to the standard below-grade home design.