The aim of this study is to examine children's desires in a toy library and what they want to do there in order to reflect their opinions on constructing a toy library in a child care center. The study has been conducted by participatory observation on a‘toy library’ project consisting of 20 five-year-olds attending B public child care center in Seoul. Observational notes were taken with voice and video recordings. The results of analysis on collected data are as follows. First, the children wanted to call the toy library a toy playground because a toy library is not for study but for play and they wanted space for rest and display with no surveillance camera. Second, they wanted to play freely without any interruption, even leaving things scattered and also wanted to play with parents and friends. Discussion followed in the view of children's right to play and to express their opinions.