Your little darling has grown up enough to observe tiny little things around him. Don’t get surprised if he starts asking questions about the same as well.
What you need to know
This is the age when your kid's curiosity levels are quite high. He will have a lot of questions regarding anything and everything. So you need to remain prepared and patient to answer those questions, no matter how small or big they are. Also, your answers or explanations to every question should be simple for him to understand and analyze good and bad in it so that he gets a learning from everything.