This study aims to research the use of smart devices of infants and preschool children, and their
mothers’ perception about it. Moreover, the goal of this study is to collect preliminary data about
problems from the use of smart devices, and to prevent the problems. Therefore, the questions of
inquiry for this study are: 1. How do infants and preschool children use smart devices? 2. How do
mothers perceive their children using smart devices? Four hundred and forty mothers, who send
their child to a day-care center or kindergarten in Busan, participated in this research and data
among 397 of them were analyzed using PASW 18.0 program. The answers to a multiple-choice
question were converted into a frequency and percentage. To verify the difference of factors,
Chi-squared Test and One-way Analysis of Variance methods were used. The following are
findings of this study: 1. Most of the families owning smart devices allow their children to use a
smart device when children want it, and children use it for entertainment purpose before their
bedtime. Children start to use a smart device mostly around the age of 4. Compared to girls, boys
spend a longer time on smart devices playing mobile game. In addition, the research indicated that
the children of younger mothers tend to use smart devices in earlier ages than the children of elder
mothers. 2. Mothers of preschool children have higher perception about the availability of their child
using smart devices compare to the mothers of day-care center. However, the research showed that
elder mothers have more positive perceptions about all the other five lower factors, (e.g. educational
characteristic, entertainment characteristic, design, safety, and smart recognition).