For a clan ninja to be seen as an adult, they must be able to utilize a Katon (Fire Element) jutsu such as Goukakyuu no Jutsu.
The clan itself is known for their ties to fire. It also gives one the ability to cast jutsu techniques only possible by possessing the eye such Amaterasu, Kamui, Susanoo and Tsukuyomi. However the clan member can not copy techniques which are unique to another bloodline. As such, the clan member can view a technique being performed and see the tricks and movements required to be able to complete it.
This doujutsu (eye skill) gives one the ability to read Genjutsu, Taijutsu and Ninjutsu and then defeat it. Select few members of the Uchiha clan possess the ability to activate the bloodline Sharingan eye. This made them prime candidates to help found the Konoha Military Police Corps, which would incorporate the Uchiha fan symbol into their official logo. Because their clan possessed the Sharingan or 'Wheel Eye,' the Uchiha excelled at being able to read and fend off attackers. The clan itself is said to be descended from the Hyuuga clan who possess the Byakugan bloodline and further back to be the heirs of the Rikudou Sennin's eldest son, who is said to have received his father's 'eyes' and with it his powerful chakra and spiritual energy. The Uchiha Clan were one of the founding noble families of Leaf village.