These sit-upons would be a great Earth Day activity for school or scouts. I would recommend it for children who are pretty dexterous with their hands. The plastic bag braided sit upon may be appropriate for kids in grades 5-8 to make. The others are probably easy enough for kids in grades 2+ to handle. Wouldn't it be a nice for older kids to make re-cycled sit-upons for a classroom of pre-schoolers or kindergaten kids?