The 3D printing pen (cat no. TL4050) is available from Jaycar and features a 0.7mm nozzle diameter, adjustable draw speed. It is supplied with a power supply and an assortment of filament, and Jaycar sells additional filament in 250g and 1kg rolls.
Watch this video for a demonstration of Sean using the 3D pen to draw a horse and cube. Sean even made that Eiffel Tower in the video using the pen.