يُشْتَرَطُ لِفَرْضِيَّتِهَا ثَلَاثَةُ أَشْيَاءَ: الْإِسْلَامُ، وَالْبُلُوغُ، وَالْعَقْلُ
The three conditions of legal obligation are Islam, puberty and sanity. Children are trained in prayer before puberty, but training is not the same as the adult Fard obligation.