You can use anything that bingo inspires you to use. I went with the numbers being called, as I couldn't find Bingo cards anywhere. My layout features lots of random numbers across the page plus a photo of a store promotion for Target that we came across before Christmas. The target symbolises the winning number in bingo. I've also used a transparency pocket featuring bingo cards.
Here's my layout
Why not join in the fun at Child's play? There are prizes to win too.