Adhering to the call for conducting “research with children” as opposed to “research on children” (Pinter, 2014), this project asked children working in groups to develop computer game ideas for their effective FL vocabulary learning. Based on the game ideas that the children came up with, a professional game designer made a game, and another group of children evaluated its effectiveness. By examining the children's negotiation processes and final proposed game plans as well as their evaluation results, the project aims to better understand the elements that are both attractive and effective for children's FL Learning-from the children's point of view. Due to space constraints, this paper focuses on the analysis of the final game plans proposed by the children.