John Adams 10111 Disney Frozen Blopens Activity Set, A pack of 10 BLO pens and 6 reusable stencils featuring your favourite characters Elsa, Anna, Olaf and Kristoff, Use the stencils provided to create fantastic airbrush pictures, or use your imagination and create your own, Place your stencil on a sheet of paper, blow through the pen and watch your drawing appear, Blow lines or circles creating different effects, Use the BLO pens as normal pens to add extra detail.