In order to simplify the pronunciation of the adult's words, children use phonological processes in the initial years of their speech growth. The present study aims at considering phonological processes in a group of two to four-year old Farsi speaking children. The results indicate that it is not possible to correctly and precisely account for the occurrences of such processes in children’s pronunciation based on the theory of Generative Phonology. In contrast Articulatory Phonology is an amalgamation of Phonology and Phonetics where we are confronted with Articulatory Gestures which are activated through time. The exact time and place of each gesture’s production are thus detectable in indices of Gestures. This study is conducted using analytical and field research methods. Children use all the phonological processes such as unstressed syllable, final consonant deletion, reduplication, consonant harmony, cluster reduction, stopping, fronting, gliding, initial consonant deletion, epenthesis etc. This paper presents the average occurrence percentage of the processes and their highest and lowest occurrences in each of the studied age groups separately. It also analyzes the relationship between age and each of the processes.