A wonderful visual and tactile experience, that really does encourage you to move around and explore the surfaces. They are very thin floor tiles with flowing colors that swirl around as you move on them. The tiles are filled with cosmetic liquid (non toxic), completely sealed and have a non slip bottom. The protective layer on the top is highly scratch and abrasion resistant. They will withstand any amount of jumping on and strenuous use by children and adults as well as the weight of wheelchairs and trolleys. They can also be used on a table top or any flat surface. It only needs a little pressure to create a dramatic visual effect.