Blow pens super activity set 2 in 1 marker and airbrush, create fantastic airbrush pictures, easily fantastic pictures with amazing airbrush effects, discover a fun way of colouring, with this super activity set, there are 11 great reusable stenciles to create lots of great pictures in bright colours. Just put a stencil on a sheet of paper, blow through the pen and see your pictures appear, blow lines or circles creating different effects, or use the boll pens as normal pens to add extra detail.Boll pen caps washable and interchangeable. They are completely safe for childrens to use, non - toxic ink. Lay stencil onto paper. Choose and spray first colours. Choose and spray others colours. Remove stencil and add spray and other details. Ages 3 and up.