The second grade lesson that I designed this year for Valentine's Day takes its inspiration from the Mexican folk art Huichol -- or yarn painting. Students use heart tracers to obtain a basic shape, then work from the outside in using glue to attach the yarn to the cut-out heart shape. The hearts are then mounted to square papers. Keeping with the three-heart theme as the younger grades, the students make three yarn-painting hearts which are mounted together on a larger paper.
Here is a student example: