and a third planar area 22 the third planar area 22 substantially perpendicular to the second planar area 20 and substantially parallel to the first planar area 18 the display deck 16 further comprises an upper platform 38 and a lower platform 40 the lower platform 40 slidably engageable with the upper platform 38 the front end of the third planar area 22 of the upper platform 38 having an first l shaped flap 42 extending downwardly and the back end of the first planar area 18 of the upper platform 38 having a second l shaped flap 42 extending downwardly wherein the first and second l shaped flap 42 s defining a sleeve for slidably engaging the lower platform 40 the support bracket 24 having an l shaped brace 26 a cap 28 attached to the top of the l shaped brace 26 and a base 30 attached to the bottom of the l shaped brace 26 the adhesive pad 32 is attached to the exposed surface of the base 30 of the support bracket 24 in which the adhesive pad 32 is for attaching to the wall below the window 12 one preferred embodiment of the method of using the window sill extension kit 10 comprises the steps of obtaining connecting opening sliding placing closing positioning sticking and mounting the obtaining step comprises obtaining the window sill extension kit 10 comprising a display deck 16 having a generally rectangular shape the display deck 16 including a first planar area 18 a second planar area 20 the second planar area 20 substantially perpendicular to the first planar and a third planar area 22 the third planar area 22 substantially perpendicular to the second planar area 20 and substantially parallel to the first planar area 18.