This study examined children's production and comprehension of questions, with the aim of discovering possible patterns in question acquisition. For the production study, questions were collected from 22 children aged 2; 0–3; 11. The data show a high frequency of yes-no, what, and where questions by age 2; 0. Why and how questions were infrequent but they increased with age. Who and when questions were rarely asked by children of any age. From the frequency data a rough chronological order of acquisition was inferred: what, where, why, how, when. In the comprehension study 100 children were tested, aged 3; 0–5; 5. The test controlled syntax and vocabulary and varied specific wh- question-words. The frequency of correct answers increased with the age of the children. When children made mistakes, their answers were not random but appeared to be following certain question-answering strategies. These included attention to semantic features of verbs and especially the placement of verbs in the sentence.