CD's for signal mirrors are 'penny wise and pound foolish.' They work very poorly. A compass may encourage a child to move instead of staying put.You need some very basic emergency instructions and perhaps some 'we are lost' playtimes. 5 Y/O children are a different ballgame from 'adults' They can be marvelously intuitive and open to simple ideas unlike grownups. But on the downside 5 Y/o bodies can't do what grownups can.