My granddaughter is 8 and will still throw things when she's overwhelmed. She isn't doing it because she's being naughty or wants to break something.
We sometimes forget that we are seeing their actions and behaviour from 'our' world or perspective. We unfortunately may react to the action and not the feeling behind it.
As adults who have had a lifetime to work on our actions, our children are just starting out.
It's good to remind ourselves to view the situation from the child's world and feelings.
Our children need gentle guidance and direction, not always scolding or showing them we are disappointed.
He is still so young and working on his skills of trying to communicate how he's feeling.
We will never regret handling situations with kindness being gentle. We can still be firm.
I'm sure as time goes on he will mature and things will change. Keep the environment safe, hard objects out of reach ect.
If he's willing after his outburst to help put the things back, even if it's made into a game do so but if not then so be it.
Gentle hugs to you and your daughter🥰

My son is 2 and is throwing things constantly. At first, he would get some sensory input from it (softly throw or drop to watch them fall) but then he started doing it more aggressively when he was mad. He gets one warning not to throw and if he does it again he gets a timeouts. I sit him on a floor cushion (we use that as our timeout chair, it’s soft if he throws himself around, easy to transport when we go places, highly recommend if you need a time out spot!) and we do deep breathing, I give him hugs mimicking my breathing to help him regulate his breathing to help him calm. He gets 2 minutes because he’s 2 (recommendation from developmental therapist) and after I make him do eye contact and I’ll say firmly “no throw toys” and give a hug/kiss. Gotta be consistent though, always discipline for it and be on the same page with your daughter and any other caregivers on how.

If he’s doing it to get your attention or a reaction, definitely ignore it though. Sitting him in timeout will reward that behavior with the attention he wants.

He is acting out of distress.. from sensory stuff most likely.. mine did as well, daughter.. now 26.. still a challenge.. love unconditionally.. and stay strong.. and advocate within all systems.. <3 Sending much love and prayers.. <3

Thank You so much, I am going to try to get the book.

Physically take him to corner and make sure stays there for while. Until he behaves then he can return but everytime he does this stand him in corner. Keep at it until he learns. But if he is low functioning this may be difficult for him to understand