Abstract: The window blind decorating kit is a kit. The window blind decorating kit is configured for use with a Venetian blind. The Venetian blind comprises a plurality of slats. The window blind decorating kit applies an image to the surface formed by the plurality of slats of the Venetian blind when the Venetian blind is positioned to block the passage of light. The window blind decorating kit comprises a stencil, one or more marking compounds, a lamp, and glitter. The one or more marking compounds and the glitter decorate the Venetian blind with a received image. The stencil guides the application of the one or more marking compounds and the glitter to the Venetian blind to form the received image. The lamp illuminates the received image.