All the components are included in your Original Buddha Board set. The semi-transparent sheet is meant to go under your water tray if you expect potential water dripping (as with children sometimes). You may place the board in landscape (horizontal) or portrait (vertical) position in the square notches of the tray. The curved notches in front of those are meant to hold your brush. Fill your tray with ½ inch of water only. Dip your paintbrush in the water and create! If water drips and pools along the lower edge, don’t forget to gently dab the excess with a clean cloth. Do not over-saturate the board (with brush stokes) and absolutely do not dip the board in water.