The most important first step is to bring her to see your PD or polyclinic doctor, so they can properly assess her growth chart and give you a safe plan that suits her age. At 10 years old, we really want to avoid any strict dieting as her body is still growing, so a doctor's guidance is important lah. Small everyday changes like reducing sugary drinks, more home-cooked meals, and getting her active with sports she enjoys can already make a real difference over time. All the best, mummy!