It's a great question and I'm sure there are many parents who occasionally look at their kids' behavior and think, "Is this normal?!" That's why it's so important to take any and all concerns about your children's physical, emotional and social development to your pediatrician. He or she has seen thousands of kids the same age as yours and therefore has a much better handle on what's "normal" and what isn't. Don't wait. Don't worry on your own. Talk to your pediatrician.
I would also suggest, that you check out the work of Susan N. Schriber Orloff, CEO and executive director of Children’s Special Services, LLC, an Atlanta-based occupational therapy service for children with developmental and learning delays. Her book, Learning Re-enabled, is a practical guide for parents, teachers and therapists.
what is normal behavior?children are learning as they grow ,they explore,they perform ,be quiet then loud.all children are not the same.look at yours and discover them,enjoy them before they become teenagers ,then you will know what wierd really is!!!