A marker-making kit for assembling a marking device having a user-determined mixture of marking solution is provided. The kit includes a base unit coupled to a marker positioning mechanism and a press mechanism. A mixing tube holder secures a mixing tube used for collecting a desired amount of one or more marker fluids. A mixed marker solution is combined, including any number of different colors of marker fluid, and used to saturate a marker reservoir. The saturated reservoir may then be transferred to a maker barrel positioned near the press mechanism. By applying an amount of force with a marker compression arm, a completed marker is secured, enclosing the marker reservoir inside a marker barrel.