Abstract: This research aims: (1) To find out the effect of the expression box media on the ability to express language in group B children in Ar Rasyid Sidoarjo Kindergarten; (2) To determine the effect of the expression box media on the ability of self-confidence in group B children in Ar Rasyid Sidoarjo Kindergarten. This research is based not only on the problems that occur in group B children in Ar Rasyid Sidoarjo Kindergarten, it is also based on innovations in learning done in kindergartens.