Extrusion kit and extruder

An extrusion kit comprising:

• an assortment of moldable segments selectable for arrangement by a user to create a moldable billet having a cross-sectional graphic distributed over a longitudinal extent of the moldable billet;
• and
• an inanimate extruder configured to receive the moldable billet, the extruder being operable to extrude the moldable billet to form an elongated extrusion wherein the cross-sectional graphic is substantially present in the extrusion in reduced scale, wherein the extruder includes:
• a cartridge including a pair of side walls connected by a bottom wall and a rear wall, the cartridge having an open front end and an open top;
• a hollow body removably receiving the cartridge, the hollow body forming a tapered passage adjacent the open front end of the cartridge;
• a plunger including a plunger plate fitted to and received by the cartridge, a plunger rod extending through the rear wall of the cartridge to drivably engage the plunger plate, and a handle on the plunger rod at a location outside the cartridge, the handle being manually operable to advance the plunger rod and plunger plate in a forward axial direction toward the tapered passage;
• and
• a coupling member operable to releasably secure the cartridge and the hollow body against movement in the forward axial direction and in a direction opposite of the forward axial direction;
• wherein a material to be extruded is loadable into the cartridge through the open top of the cartridge.