Seriously, this is waaaayyyyyy more fun if you have a road trip planned. But if you don't, make a chart for your kids and head to the nearest parking lot and do some "scientific" research.
What is the most popular car color or body style where you live? Find out.
Before you get in the car, have your children hypothesize what is the most popular color (or style) of car in their town. Write down these hypotheses.
Make your children a chart. You could just do color. Down one side put in the colors--red, blue, white, black, silver, green, yellow, orange, gray. (Or do the same things with body style: sedan, convertible, truck, van, SUV, motorcycle, etc.).
Now, get in the car and drive to the nearest big-box store parking lot and have your kids make tally marks for each color/style they see.
When you get home, tally your results. Count the total number of cars. Then make a bar graph representing each color (or style). If you feel really ambitious, figure out the percentages.
Present your results really scientific like to another parent/partner/neighbor/unsuspecting stranger.
I love scientific fun :) I'm nerdy like that.