What teeth do kids lose first is the same teeth he has got first. Children generally lose their baby teeth in the same order in which they come in. There are 20 baby teeth that fall out. Girls usually lose their baby teeth before boys do. The process is just like the process of getting the baby teeth and can take more than two years to complete. After that, the child will need more dental caring of his teeth. These teeth, which will stay along with him for the long life time.