Agree, Teppan Edo is lots of fun. Now if your kids like to get up and move around at dinner, you might consider the Biergarten. They have entertainment where the kids can come down on the floor to dance, etc.
So, if your kids need to move around ... Biergarten. If they are good at sitting at a table, then Teppan Edo. Either is going to be fun for all involved. The Biergarten is buffet and with the entertainment can be a bit more "festive" in atmosphere.