Carpet Tiles, Solid Color Expansion Pack, 12in x 12in, PK4 Solid Color Expansion Pack includes four solid color tiles.WonderFoam® Carpet Tiles are easy to clean and vacuum-friendly. WonderFoam® Carpet Tiles are brightly colored and soft-textured carpet squares that provide more flexibility than traditional classroom carpets. They are even durable enough for outdoor use! These 12" x 12" carpeted foam tiles can be intermingled to fill a large area, or used as individual seats for children.