I’ve been doing this since he was 2 x
I found buying my LO a spinner seat helps calm him down most of the time x
Is there a pattern to your son's meltdowns? Does he have a meltdown after something specific happens? The first thing you need to do is observe your son and find out the cause(s) for his meltdowns. Once you find the causes you can either remove them or make them less triggering for him depending on what it is. Second, it would also be a good idea to try to meltdown proof your home or give him his own space to meltdown in. If he tries to throw himself off the stairs, install a baby gate. If he is destructive during meltdowns, take him to a safer place with less hazards like his room. As for meltdown time advice, I would take him to a safe area and let him ride it out until he's calm. Depending on how verbal or emotionally aware your son is, try to talk him through it after he is calm. What caused it? What was he feeling at time time? How is he feeling now? Etc. My son used to have meltdowns quite a bit when he was toddler-preschool age.
He has a speech delay and, at that time, he couldn't tell us the causes behind his meltdowns, so observation/pattern seeking was highly important for us to figure out the causes. Once we were able to figure out what was the cause, we had to mitigate the risk of meltdowns accordingly. Hope this helps and good luck!
My little boy who’s 3 1/2 has melt down all the time I take him to his room and sit and try talk to him if he is still having a meltdown I will sit there until he has calmed down and when he has we breath together to make sure he is calm and talk about why he has his meltdown and how he can communicate with me to let me know why he is feeling this way and how I can help him in the situation x