Child "SAFE" Shuriken 07

A Shuriken (Japanese: 手裏剣, lit. 'hand-hidden blade') is a Japanese concealed weapon used by samurai or ninja or in martial arts as a hidden dagger or metsubushi to distract or misdirect. 

Shuriken are also known as throwing stars, or ninja stars, although they were originally constructed in many different shapes. The major varieties of shuriken are the bō shuriken (棒手裏剣, stick shuriken) and the hira shuriken (平手裏剣, flat shuriken) or shaken (車剣, wheel shuriken, also read as kurumaken).

Shuriken functioned as supplementary weapons to the sword or to other weapons in a samurai's arsenal, although they often had an important tactical effect in battle. The art of wielding the shuriken is known as shurikenjutsu and was taught as a minor part of the martial-arts curriculum of many famous schools, such as Yagyū Shinkage-ryū, Tenshin Shōden Katori Shintō-ryū, Ittō-ryū, Kukishin-ryū, and Togakure-ryū. 

Shurikenjutsu (手裏剣術) is a general term describing the traditional Japanese martial arts of throwing shuriken, which are small, hand-held weapons used primarily by the Samurai in feudal Japan, such as metal spikes bō shuriken, circular plates of metal known as hira shuriken, and knives (tantō).

Shurikenjutsu was usually taught among the sogo-bugei, or comprehensive martial arts systems of Japan, as a supplemental art to those more commonly practiced such as kenjutsu, sojutsu, bōjutsu and battlefield grappling kumi-uchi (old form jujutsu), and is much less prevalent today than it was in the feudal era.

(use 100% infill so that they are strong)