In today’s society, electronic media are thoroughly integrated into the fabric of life, with television, movies, videos, music, video games, and computers, central to both work and play. While these media outlets can provide education and entertainment to children, many pieces of research are concerned with the negative impact of electronic media on children. Media is used as a third parent or servant. A lot of aspects is important related to media exposure and child behaviour. Media exposure affects the neurodevelopment, nutrition and health and academic achievements of the child. Parent education plays an important role in the behaviour modification of the children. Magnitude of the problem --World scenario. According to the Common Sense media research Study,(2013), 1,463 parents were surveyed of 8-year-olds from May 20 to June 12, 2013 Half (50%) of all children ages 0 to 8 have used mobile apps, up from just 16% in 2011. Use of mobile media starts young: more than a third (38%) of all children under 2 have now used a mobile device for any media activity compared to 10% two years ago; among 2- to 4-year-olds, the rate has gone from 39% to 80%; and among 5- to 8-year-olds it has gone from 52% to 83%. This magnitude of the usage of the mobile gadgets daily by the children for hours together lead to many problems. This mobile gadgets usage by children are allowed by the parents to their children for their own good reasons who are Purposive cluster sampling technique was used to select the setting of the study. Unaware that this practice can lead to many health issues in the growing children. Therefore this study aims to study the effectiveness of computer-assisted teaching on knowledge and attitude of parents on the influence of mobile gadgets and internet use on the development of their children".20 parents of the children aged 6-12 years were selected from urban area of Delhi by Purposive cluster sampling technique was used to select the setting of the study. . Research design adopted was Pre experimental one group pre-test post-test only design for the present study. Instruments used for data collection. A self-administered structured Questionnaire, to collect demographic data and knowledge and An attitude scale regarding the effect of mobile gadgets on children aged 6 to12 years. The results show that shows the pre-test and post-test level of knowledge score among parents on the influence of mobile gadgets and the internet on the development of children. In the pre-test, 70% of them are having inadequate knowledge, 30% of them are having a moderate level of knowledge and none of them are having an adequate level of knowledge. In post-test, none of them are having inadequate knowledge, 40% of them are having the moderate level of knowledge and 60% of the parents have an adequate level of knowledge. In the pre-test, 55% of them are having Poor attitude, 30% of them are having a moderate level of attitude and none of them are having a good level of attitude. In post-test, none of them are having Poor attitude, 35% of them are having a moderate level of attitude and 65% of them are having a good level of attitude. Knowledge and attitude of the parents were positively correlated at p= 0.001 level in the post-test which proves that the computer-assisted teaching was very effective in the improvement of knowledge and attitude of the parents regarding the effects of the mobile gadgets on the children aged 6-12 years.