UPDATE- How young is too young to attend a funeral?

My ex’s father was diagnosed with two brain tumors and he doesn’t have a very good prognosis. We have two children ages 5 and 6. I personally don’t feel like they would understand and I’d rather them not attend a viewing. I know that it may seem selfish for me not to let them go but I don’t want my children to be traumatized by seeing their grandfather in that state. Me and their dad are also in the middle of a very ugly custody battle because he refuses to Co parent with me or even communicate with me at all. Everything is thru his mother. So it’s hard for me to want to do anything to accommodate to them when they wouldn’t even do the same for me.

UPDATE: so I noticed ALOT of you had some of negativity to share simply because I stated we are in the middle of a custody dispute. Never did I say I “hate my ex so much” lol I fact it’s quite the opposite. And the only reason I pointed that out was because I’m sure if they wanted my kids to attend it would be my kids only, not me. And usually I don’t care about me not being around, I trust their judgment BUT being that this is their first time at a funeral at all I don’t think it something I would like for them to attend alone. Their dad goes months without seeing them and my daughter specifically only BARELY started having overnights with him because he refused to really bond with her. So again, I know my children and I don’t think they would handle it too well. With that said, I am in no way trying to keep them away from the other side of the family but instead simply trying to find common ground in the midst of all the tension in the best way possible FOR MY KIDS. And yes I have, and continue to, allow my kids to constantly be at his bedside at the hospital.