Media entertainment refers to users' enjoyment of media-induced sensations. This chapter argues that users feel entertained to the extent that media supports their adaptive tendencies to recreate and grow psychologicallY. Within the boundaries of their physiological regulation, users are believed to engage actively in cognitive, affective, and behavioral challenges imposed by media, in order to grow psychologically. However, a lack of physiological resources may limit users' engagement in challenges and consequently strengthen their enjoyment of more recreational and supportive media content.