Brain Gym[R] (BG; BGI, 2008) is a popular commercial program sold by Brain Gym[R] International (BGI). Making extravagant claims for improved intellectual and physical development, it is used in more than 80 countries. While BGI's claims are persuasive, to date there is little empirical evidence validating the approach. We examine some theoretical assumptions from which BGI was developed, review the efficacy literature, and provide suggestions for making informed decisions about the judiciousness of investing time and resources in this program. (Contains 1 table.)