Do they understand "no" at this age? Mine just looks at me and laughs then carries on with what I'm doing, if it's unsafe a say it again firmly and remove him, he usually has a fit!
It's just little things like dropping all his food from his high chair, climbing up on things he's not allowed on (because they're unsafe) and throwing all the bath toys out of the bath (full of water) one by one
How should I be dealing with this please?