No. Truthfully these kids will get bored very quickly and with all the people it will feel like a party to them, they will not understand the somberness of the get together.
They would be very good I am sure but really, they don't need this exposure to this type of family activity.
I think also that if the kids are not around this person all the time they won't even realize they are gone, sort of out of sight out of mind. They really aren't going to remember this person in a year but they will remember the atmosphere and tension they feel. They'll see people crying in a huddle and they won't understand it.
When my MIL was dying from small cell cancer on her liver her sisters came to see her the weekend before she died. I was there and so was my granddaughter. She was a toddler and doesn't remember her at all. But she can still remember seeing one of the sisters coming out of my MIL's bedroom and she started tearing up and went to the other end of the house to weep. It really troubled my granddaughter even though she was small. She didn't understand it and developed some fearful feelings about what was in that room that my MIL had been in. She just knew that something in that room made grown people cry and she would have nothing to do with it for a long time.
I think that I would get a babysitter for a couple of hours and go with hubby. I would expect to see relatives and enjoy visiting with them in a quiet general kind of way.
On the other hand. If all the relatives coming have kids and they are all bringing them then a couple more won't hurt. So it depends on your family dynamics and what others are planning on doing.
Your cousin may find joy is seeing the kids too. My friend went to the hospital to her her gall bladder out and they found her to be completely full of cancer. She never went home. She died a week or so later. I took my granddaughter with me when I went to see my friend. This friend would come over to watch TV almost every night, she would go with us for ice cream if we were out and about. They knew each other and my granddaughter loved her. She was still just a little thing, maybe 2, but she knew my friend.
She looked at the kids, I took both my granddaughter and the baby, I held him the entire time, he wasn't even crawling yet. My friend lit up like a light bulb. She was so glad to see the kids and no one was bringing theirs. We stayed about 10-15 minutes, that was the last time I saw her. It made me feel good to see her face when she saw the kids. She told me they were a gift from God and that we should treat them as that.
So, there you go. A wishy washy answer.
I think you have to decide this one for yourself. It depends on who else is coming, if other kids will be there, if your kids are the kind to sit quietly and be still or wild heathens like my grandson. How will this mood and somber occasion effect them, and how will you feel if they go and totally act up and destroy the last time a lot of people will see this person.
To this day I have 2-3 memories of my grandmother. I remember sitting at her table for dinner and I remember her funeral. I remember standing by my mom's side and watching her cry. I didn't understand why she was crying. I am 53 years old and have this vivid memory of attending a funeral. Kids will remember things like this and do you want that?