Rotating toothbrush relieves teething pain
My son is 6 months old and has two teeth and is working on two more. He's at that age where he explores everything by sticking it in his mouth. He was curious while I was using my rotary toothbrush, so I rinsed it out and let him hold it. He promptly put it in his mouth. I expected him to be appalled at the rotating brushes, but it seems to massage his gums and make the teething hurt less. Now he wants to use it every time I brush my teeth, so I'll be getting him his own. It solves two problems: the current teething pain and the future need to instill good dental hygiene.
A good hack as long as the parent handles the toothbrush.