Is that table big enough to seat five? Will it be used daily or just a few times a year?

It can seat 5-6 people. It will have daily use by kids.

How about a photo of the room in which the table will go?

Table is a nice choice...you can go a bit rustic, a French, leather, upholstered, modern....but we need to see the room.

Do you have a chandelier?

I wouldn't want upholstery/fabric on chairs getting a lot of use by children. I'd want a surface that was easy to clean and didn't stain easily.

I'd go with something similar to the wooden chairs in the first photo, and maybe add washable seat cushions.