Abbie,
I have to agree with Page. Your son is only two and is beginning to explore his imagination. Don't be so quick to call him a liar. Children at this age generally don't lie. They tend to speak some form of the truth; albeit very colorful. Remember he is awed by most things as they are new and exciting to him and so some exaggeration should be expected. Additionally, he is just learning to communicate thus making it more difficult to tell you what he's see, heard, etc.
My advice, coming from a mother of four adult children with very vivid imaginations at that age, is to listen carefully to what he is saying, read between lines and learn to ask the right questions. If he begins to feel you don't believe him he will stop talking and/or telling about his experiences which could be very dangerous considering the world we live in.
For all you other moms that read all the books and listen to everything your pediatrician says try listening to your instincts, your mothers and grandmothers. They raised children without all the books and guess what.....you turned out to be a pretty descent human being. I'm not saying reading is not good as it can give you some perspective, but it is someone elses perspective. Don't put too much stock into what another person has to say about YOUR child.
PERSONAL EXAMPLE: One of my kids was diagnosed with ADD at the age of nine. What was the first thing the pediatrician wanted to do? Prescribe a drug. Against the advice of her pediatrician I refused to make that our only option. Instead, I researched and elected to make some changes. I changed our diets and created a schedule (chores, homework & fun-time) that was manageable for a child that age and worked diligently to help her gain the coping skills needed to be successful student and adult. She now attends an Ivy League University on full scholarship. My point: had I listened to the doctor she would have been on meds for the rest of her life to cope with this issue when all that was need was some well spent time and perseverance on my part. Coincidentally, I took this approach with all my children and each of them attend or have attended some of the better schools in the country and all on full/partial scholarship.
I hope this helps you and other moms to make informed decisions when it comes to the health and well being of your families. Simply because some one has a degree doesn't mean they know everything...especially when it comes to YOUR child.
Have patience & good luck!
CM