Does anybody else's child refuse to listen to them?! 
My daughter is 18 months old and has a very big, strong willed personality she's a stubborn little madam and can be a bit of a handful.
I find myself saying 'no' constantly. Asking her not to do something then half a minute later she's doing it again. 
I've tried raising my voice but she doesn't care and just looks at me like "I don't care"
There's things we tell her every day not to do like messing about with the switch on the fish tank or going by the side of the sofa or turning off the tv/messing with remotes but she does it constantly throughout the day as if she's forgotten she's been told off for it before!
Is this just an age thing?
What do you do when your child doesn't listen? 