 As tactile works of art, it is necessary to touch them to perceive them, by placing one's finger into the hole to feel the material that is hidden within the box.The hidden contents of the boxes comprise such various things as beads, bristle brushes, hair, cotton balls, nails, and sponges.The artist's intent, by including things such as nails, which can potentially prick the finger, in the possible contents of the box is to ensure that the user touches the box with an "enquiring, learning gesture".