my son open the fridge and take stuff out himself.. i told him cannot open himself.. and just now i caught him again.. i told him no.. he is resisting now.. i have to be firm but how should i say?

I'm using a fridge lock since both kids are young. I educate them to ask for permission if they need something. So is a habit for them to ask for permission even when sometimes I forgot to lock the fridge.

Try n talk it out with him, pls understand why does he do it? Once he tells u,u can reason out with him..

You need to stand your ground. Before anything why is he opening it? Does he want water or something?

How old is your LO? You can consider getting a fridge lock to prevent from LO opening it again.