The two players take one card and without looking put it on their foreheads. They hold it so the third student can tell them how much it equals. This is an idea I got from a LEP class. Students choose a fact that is difficult for them, a target fact. They write this fact on cards or pieces of paper and tape them in obvious places around the house- bathroom mirror, doors, fridge, tv, etc.
Students can change the facts every couple of days.
I also see no reason not to encourage parents to invest in a drill and practice computer program, they can be just a cheapie 10 dollar disk. Here is a site where you can play with flashcards, memory games or make your own games. Go to the site and click on Mathematics. Follow the choices. We had math fact drill everyday at the sound of a bell.