I have a tip for children bickering. I have passed this tip along and had reports back at how amazing the results. I used this until my children were grown and now my grandkids get a dose.
Have the 2 kids that are bickering, either sit on the couch facing each other or stand facing each other with the tip of their noses touching for a set amount of time (not as long as time out).
Who gets the front seat? No problem but they have to sit with their noses touching. My daughter and son both agree that they would refrain from arguing because they did not want to have to stand or sit that way.
Most of the time giggling would happen before the time was up and they were friends again.
By Meemaw from FL