This paper (1) presents the first partially manually verified treebank for Dutch CHILDES corpora, the AnnCor CHILDES Treebank; (2) argues explicitly that it is useful to assign adult grammar syntactic structures to utterances of children who are still in the process of acquiring the language; (3) argues that human annotation and automatic checks on this annotation must go hand in hand; (4) argues that explicit annotation guidelines and conventions must be developed and adhered to and emphasises consistency of the annotations as an important desirable property for annotations. It also describes the tools used for annotation and automated checks on edited syntactic structures, as well as extensions to an existing treebank query application (GrETEL) and the multiple formats in which the resources will be made available