Echolalia is the repetition of other people's verbal utterances - words, phrases, and sentences. Although it is often claimed in the literature that typically developing children go through a phase of echolalia around their first birthday, there is little systematic research to support this claim. The aim of this work was to determine developmental changes in the characteristics of immediate echolalia in typically developing children aged 1-3 years. In addition, both the utterances preceding and following echolalia were analysed to gain better insight into the linguistic context in which echolalia occurs. The analysis was based on the Croatian Corpus of Child Language (CCCL - Kovačević, 2002), which consists of language samples of spontaneous interaction between three children and adult speakers in their family environment. The aforementioned corpus was created through longitudinal observation of the children's language acquisition. The results of the study showed that the most significant frequency of echolalia in typically developing children is present in the first half of the second year of life, with a peak at about 16 months. It also showed that the proportion of echolalia in spontaneous speech can reach over 25% during this developmental period. Typically developing children mostly make specific changes in the statement they repeat, selectively repeating only some words and omitting others. In addition, the study showed that the average length of echolalia is shorter than the average length of the child's independent utterances. Interestingly, the study showed that echolalia follows to a lesser extent utterances that require the child to respond with specific semantic or syntactic structures compared to utterances that do not impose this requirement. The adult response to echolalia varies widely in the available transcripts, but often includes imitation and affirmation. This is important because it has been observed that vocal and verbal imitation by the mother can positively influence the child's speech and language development.