A two arm cluster randomized control design will be used to select a total of about 400 participants each of the control and intervention groups. The participants will be drawn from primary health care (PHC) centres offering immunization services in Ibadan. In the intervention group, mothers will be trained on early brain stimulation using group video sessions followed by individualised question and answer sessions. These sessions will take place at 6 week and 10 week post natal immunisation visits. The control arm will receive the standard of care - routine immunization care- group health talks.