Here is a great way to teach kids about knife safety and the mechanics of how a folding knife works. Â this Real working model of a lock-back knife enables young outdoor enthusiasts to build their very own folding knife. Â the smooth rounded plastic edges make it safe for kids ages 7 and up with adult supervision. Â just like the original nathan's knife kit, this kit is a great way for adults to teach youngsters about the function and safe handling of a folding knife while imparting the safety concerns of a Real knife. Â Kids love building and taking apart trigger knife kits over and over. Â the fun gets even bigger with 13 mix and match colors that allow kids to customize their very first knife in their favorite color combinations. Â .