In my opinion, school districts should definitely be implementing turf. The gravel that most playgrounds have is way too tough and I see kids falling left and right, often leading to injuries. Our landscaping company just finished a job for a school and the teachers say the kids are enjoying it a lot more. We went with the natural feel ones because of how soft it is. We hope that more schools also choose to use turf as an alternative in the future because it is much safer for the kids.
