Use the blo pens siper activity set to discover creative airbrush effects blow in lines and circles as well as blowing harder and softer for different effects just put a stencil on a sheet of paper blow through the pen to see your drawing appearr there are 14 great stencils to create lots of pictures in bright coloursr blo pens caps are washable and interchangeabler the workstation lets you store your pens and paper whilst having a mess free work arear use the same pens to colour in extra