Holy Saturday in my house growing up was always a quiet day. We colored eggs, quietly. We cleaned the house for Easter Day, quietly. We helped get the large Easter dinner, quietly. We read and went to our rooms, quietly.
I highly suggest you do not shop, do not watch TV or use the computer, do not allow your children to be loud. Christ is in the tomb. One can plan ahead and not be running out at the last minute for things or food.
Teach your children to meditate on the Cross and the Death of Christ, so that they can appreciate the Resurrection.
Their world, after you are gone, will be ruthless towards Catholics. Train them now in the way to go.
For we are buried together with him by baptism into death; that as Christ is risen from the dead by the glory of the Father, so we also may walk in newness of life. Romans 6:4 DR