This investigation focuses on the subtle features of the Syntax-Semantics and Syntax-Discourse Interfaces as they are manifested in the comprehension and production of typically developing children acquiring Greek as a native language. Many studies have concluded that aspectual semantics is acquired at any early age in children. The results of the present study are consistent with this observation. Moreover, it offers proof that the integration of pragmatics and compositional properties of telicity, which are necessary in order to overcome the lexical aspect of manner-of-motion verbs in non-locative contexts (due to lack of coercion, which does not occur with motion verbs), leads to processing load and results in a delay of acquisition after a child reaches 10 years old.