Encourages visual processing and sensory stimulation for all ages. Invite sensory-seeking kids to step, sit or jump on the tiles and watch the colours ooze. Even young children can push the gel around with their hands. Place several on the ground to create a colourful floor mat or walking path. Each 50 cm x 50 cm (19-1/2" x 19-1/2") tile holds up to 68 kg (150 lb). Acrylic tile with wood base. Set of 4 includes one of each colour (blue, purple, green, orange).