Speak in a gentle or soothing tone.
Provide a comforting touch like a hug or a gentle pat.
Ask questions like 'why are you upset?' and let them share.
Try to distract keep them engaged in multiple activities.
Crack jokes to lighten up their mood.
Make a calming corner in the house for their alone time.
Ask them to take deep breaths to calm themselves.
Take them for regular outings for a refreshed mindset.
Spend time with them by playing games.
Comfort them by making their favourite food.