Social robots and the Internet of Toys present key technologies in children's future life.Based on Winfield (2012), we conceptualize the relationship between social robots and smart/connected toys with six characteristics: interactivity, energy, sensors, software-control, movement, and embodiment. These characteristics, in turn, help to classify social robots and smart/connected toys along three dimensions (i.e., horizontal, vertical, and spatial integration), which suggests that social robots and smart/connected toys differ gradually rather than categorically. We identify three common theoretical (absence or heterogeneity of theory, lacking developmental perspective, insufficient attention to intercultural differences) and three methodological issues (lack of standardized measures, study design issues, dominance of cross-sectional studies) that research on both social robots and the Internet of Toys needs to address.