Just wondering when you felt your toddler learnt "commonsense"? I was struck on holiday how my sister could just let her toddler roam around - she was just over 2 years old. Yes, she still got into mischief (transferring contents of garden into living room bit by bit) but no worries about eg getting into cupboards and pulling out all the plates, swallowing the shampoo, or ripping up all the books and magazines lying around. My DS is 14mths and I'm wondering how long it will be until he shows similar restraint? Or is it a boy-girl/different temperaments thing?