What is why would a child stare at you?

As an AI language model, I do not have access to the context or the situation where a child is staring at someone. However, there can be many reasons why a child might stare at someone, such as curiosity, fascination, confusion, fear, shyness, or even a medical condition like autism. Children's behavior and emotions can be complex and varied, and it's important to observe and understand their behavior and context before interpreting their actions. It is always a good idea to seek advice or guidance from a medical professional, child psychologist, or parenting expert if you have concerns about a child's behavior.