Print the Bingo Game Sheets. Slide the Bingo Game Sheets and a crayon into the plastic ziplock bag. You can tape the Bingo Sheet in the bag to hold it in place so it won't move around. [OR you can punch holes in them, and put them in a notebook]
We like to take notebooks when we travel, that way the kids have some paper to write and draw on. Use the notebook as a desk, this makes it easier to write on the Bingo Sheets.
As you (your child) sees one of the objects or signs found on the Bingo Game Sheet, use the crayon to mark their find on the ziplock bag. Using the bag is nice because you can wipe the crayon off the plastic bag and play the game several times without having to print a lot of Bingo Game Sheets.