The amazing Surfloor liquid tile comes in 4 bright cosmic liquid colors that move with every step, jump, dance, or Hop! these tiles are new to the USA but have already become a big hit throughout Europe in schools, kindergartens, retail stores, hotels, bars, restaurants, museums, kid's playrooms, bedrooms, and more. The bold contrasting and changing color patterns of the Surfloor tiles will stimulate sensory and perceptual development while being mesmerizing fun for all! the tiles are 19.5"X19.5", are leak-proof, and contain an anti-slip back side pad.