After he finished collecting data in Selangor (one of the thirteen states in Malaysia), Naqi travelled another 500 miles to collect data in three other states (Johor, Kedah and Kelantan). In these states, Naqi gathered data from another 1173 participants before returning to the Netherlands. Thanks to all this effort, we will be able to take into account the influence of different social backgrounds and living environments on children's development. Now, the process of analysing all the data has started, an exciting and motivating new step! We would like to express our gratitude and appreciation to the schools and children who participated in this project.