Transportation Skip Counting 2’s, 3’s, 4’s, 5’s, 10’s, and 100’s eBook is a great way to learn to learn to skip count. You can use this in your transportation theme unit while learning about various types of transportation that are in the air, land, and water. For the 2's -10's, it goes through 120, and for the 100's, it goes through 1000. I used the blue car for 2's, the sailboat with a triangle for 3's, the train for 4's (since it has four sides), and an airplane for 5's (since airplanes fly high in the sky). This can be used with the math common core standards or just to have fun in homeschooling, classroom, with your children for math review, etc.
Another transportation theme book that I have is
Transportation Matching Games