Table 1. Speaking children develop sounds

By 3 month	Cooing sounds
By 6 month	Babbling sounds (ba, da, ma)
By 1 year	Reduplicated babbling (bababa, mamama), canonical babbling
By 3 years	m, n, p, b, t, d, k, g in words
By 4-5 years	s, sh, ch, j, ng, r, l in words