text: Parents will send them with their kids to call when they need to be picked up, in case of an emergency, or if they walk to school to call when they get there. Plus what would students do with them. I go to the skate park before school and I always use it when I'm there. I also don't go straight home after school, so what am I supposed to do when my mom asks me to call her. Do you want me to hide it or bury it and come back for it after school.