I have the exact same kid
. My own sons were like this too, so it's perfectly normal. My favourite way of dealing with it is to stay out of sight and watch them until they are about to do something, or even when they get that look in their eye, and then say their name sharply or say something like " ***, don't even think about it!" in a drawn-out way. It makes them start to think you've got eyes in the back of your head
, and they do start to rethink a lot of the sneaky behaviours.
You have to be hyper-vigilant with this kind of kid, and it's exhausting (thank goodness mine is only 3 days/week!). But they can also be the sweetest kids ever. Good luck!