In this short paper we employ a Language Model (LM) to gain insight into how complex semantics of a Perception Verb (PV) emerge in children. Using a Dutch LM as representation of mature language use, we find that for all ages 1) the LM accurately predicts PV use in children’s freely-told narratives; 2) children’s PV use is close to mature use; 3) complex PV meanings with attentional and cognitive aspects can be found. Our approach illustrates how LMs can be meaningfully employed in studying language development, hence takes a constructive position in the debate on the relevance of LMs in this context.