The present study aimed to train Traditional Birth Attendants (TBAs) in a parenting program called Learning through Play (LTP) to improve their Knowledge, Attitude, and Practices regarding child development after completion of training, for them to be better able to support parents during their routine practice. Quasi experimental design was used. A total of 330 TBAs meeting study eligibility criteria were included and data was collected in a group setting. LTP training was comprised of weekly sessions delivered over 1 month. LTP includes knowledge about child development for children from 0 to 3 years. The Knowledge, Attitude, and Practices (KAP) questionnaire was used to measure change. Statistical analysis was done through Paired Sample T -test. There was a significant difference between pre-post scores t = -29.36 (p <.05). Capacity building of TBAs in LTP program and integrating LTP into existing health care systems may contribute to reducing the child development gaps in Pakistan. Plain Language Summary: Purpose: This study was designed to train the Traditional Birth Attendants (TBAs) in a parenting intervention programme called Learning through Play (LTP) to improve their Knowledge, Attitudes and Practices regarding children's physical, cognitive, and socioemotional development. This training would give them skills to support parents efficiently as a part of their routine practices. Methods: A total of 330 TBAs participated in this study and data was collected in a group setting. LTP training included weekly sessions given over a period of 1 month. The LTP training programme includes information about child development for children from birth to 3 years. The Knowledge, Attitude and Practices (KAP) questionnaire was used to measure change in knowledge after this training. Results: Results showed that there was significant difference between pre training and post training scores. The TBAs scored higher on KAP questionnaire after completing the LTP training as compared to the KAP scores before attending this programme. Conclusion and implications: Training TBAs in LTP programme and integrating LTP into existing health care systems may contribute to reducing the child development gaps in Pakistan. Limitations: Post assessment was conducted immediately after completion of the training; we would recommend for future studies to conduct a follow up assessment to find out how well they remember the information and to what extent they implement the gained knowledge into their routine practice. [ABSTRACT FROM AUTHOR]