Investigators were provided specially designated healthy tiffin box to encourage children healthy eating habit started from their school time. In this feasibility study, children were selected for tiffin box intervention based on their higher BMI and based on consent from their parents. For children aged 11-12 years old, we were collected their assent beside their parent's consent. The tiffin box was designated based on available design of box with addition compartment from the local market. In order to building a healthy tiffin box, we were designed additional four compartments with appropriate portion size for whole grain, snakes, fruits and vegetable. For assessing feasibility of implementing "Healthy Tiffin Box" intervention we were adopted three steps.