Recently there have been several efforts to address the problem of development tools for building feature models. However, such efforts have not considered a number of factors due to human imprecision such as syntax, semantics or congruence, that must be taken into account to build these models. This paper presents a proof of concept for a tool for building feature models. The tool (i) is based on a previously defined meta model, (ii) includes a set of constraints to prevent building syntactically incorrect models, (iii) use of ADOxx technology and ADO script programming language. The tool aims to provide engineers and researchers the ability to build feature models exploiting the potential that delivers ADOxx.