Technology company WobbleWorks has launched an updated edition of its hugely popular 3Doodler pen, which can now draw using materials like copper and wood composites (+ slideshow).
The pen uses a similar method to 3D printers, functioning like a hot glue gun to extrude lines of plastic-based filament that can be used to draw in the air. The material then cools and solidifies, forming stable structures.

WobbleWorks launched the first version of the 3D-drawing pen on Kickstarter in 2013, attracting $500,000 (£380,000) of support from over 5,000 backers in one day alone.

The company hopes the new 3Doodler Pro will attract a new audience of architects, designers and other professional users hoping to create 3D forms and models.
The 3Doodler Pro pen works with a range of new materials, including polycarbonate and nylon. It also handles plastic-based composites of wood, copper or bronze.
The composites contain a high percentage of the "real" material, and can be sanded or polished after they've been extruded.

Related story: 3D-printing BioPen "draws" with living cells to repair damaged bones

The 3Doodler Pro features dials that control temperature and speed, as well as a fan to give users greater control over how quickly the plastics cool down. An LCD display shows temperature indicators.

"When we started the 3Doodler journey back in 2013, we had world-leading architects telling us 'I want to do this'," said WobbleWorks co-founder...