PLAID-Challenge Stencils. Kids will learn and have enjoyable doing it with the help of those stencils. Every bundle comprises six 11×8-1/2in heavy paper stencil sheets in specific themes: Family Tree; Vacation/Trip; Recycle; Science; Sun Device; D.C. Landmarks and extra. Contents conform to ASTM D4236. WARNING: Choking Hazard-small elements. Now Not for children below three years. Imported.