As parents we were wanting our children to spend their time on Sundays really keeping it "Holy." That means to us, placing other things aside they would normally do during the week and do things that would bring them closer to their family, closer to their Savior, build upon their testimonies of the gospel of Jesus Christ.
I had heard a friend talking about a "Six at Six" she did with her family and tweaked a few things to make it work for us. I came up with this chart that I hang up on our fridge.
Notice all the choices of things they can do on the bottom. Things like: read scriptures, write in their journal, read a good book, visit a relative, serve, write a letter, etc.
Our children are supposed to do 6 of these items during their Sunday and can mark each off with their little "stick figure person." I just put velcro on the back of each figure. At six o'clock if they have done them all then they can have a family dessert with us.
Maybe it'll inspire for your Sabbath Days! Happy Sabbath Days to all!!!