Colouring-in is now officially an ok, sane and cool hobby for grown-ups, meaning it must be time for kids to take creativity to the next level and stay one step ahead of us oldies. Hamleys Sprayza Stencil set is part of an inventive range of arts and crafts products encouraging boys and girls to unleash their inner Banksy with some awesome and quirky artwork. This art set includes 16 Stencils.