Janice, I hear ya. Our grandson has temper tantrums galore. He's 3. Both my son and dil do so much to "appease" him. Our granddaughter never had them but my son( grandson's Dad) had those same tantrums when he was my grandson's age. We handled it a bit differently LOL. Oh well, it will all be okay. They are great parents and I'm sure it will get better as time goes on.
BTW my son had them until he was 6! I haven't told him as he is quite frustrated right now. hahaha