Attic Gal Alysa says:
Do you ever have those times where children are fighting for the front seat of the car or who goes next in a game? Here's a fun solution that our family uses. The Cube. Last summer I made this while I was traveling with my children without my husband. I needed it for my sanity as I knew the children would be fighting for seats, music, food, etc. As you can see mine has had a lot of use. I need a new one for this summer and beyond. (I think the next one I make I'll include Attic Gal Rachelle in on the fun and we'll come up with something really wonderful. )
Just take a cube of wood and either modge podge pictures onto it or tape it. I taped the outside of the whole block just because I couldn't find the modge podge at that time. If you have too many children for the 6 sides, double them up or if you have less, put their face on there a few times. You can add parents, grandparents, friends, whomever you want.
This works for our family and takes the blame off me and onto the cube :)