Signing: Floor is signed by taking both hand flat with palms facing the ground and thumbs touching, then moving the hands apart. The sign looks like you are miming an imaginary floor.
Usage: Floor is a sign best left to older children. Because the floor is so ubiquitous, babies often have trouble grasping the concept. When you do introduce the sign, you can teach it by contrasting the floor to the walls and ceiling.
Flash Card: Click the link to view the Floor Baby Sign Language Flash Card. The flash cards are printable and available in both U.S. Letter and A4 sizes.