And that’s partly because 3D-printing pens aren’t as forgiving as this 3D Foam Pen that swaps melted plastic for soap suds. The $42 foam pen is also much safer than 3D-printing pens which have ...

Two German artists have just completed a project called "linear," in which they dragged a large foam pen around the desert. They walked in a 400-mile rectangle through Utah, Colorado and Wyoming ...