This article reports on between-individual and within-individual variation in consonant cluster reduction strategies (where C1C2 is realised as C( or C2) among young children. The empirical base of the study is a Dutch database with over 9,000 instances of C1 and C2 realisations of 23 word-initial consonant clusters from 45 children aged between two and three years old. The study finds that within-child variation is very limited, whereas between-child variation occurs. It is also shown that there are typological implications; that is, realising C2 in cluster y, implies realising C2 in cluster y, but not vice versa. The data provide support for the position that variation can be accounted for by a finer grained notion of sonority where the sonority distance between the two consonants in a cluster plays a crucial role in establishing prosodic constituency.