This is the first place your kids can have fun. By letting them choose their pictures they will enjoy having the choice. Children like to feel they are big enough to make decisions and that their desires have an impact on the world, so let them browse the available pictures until they are happy.
When a child sits down for a coloring session they should be given free rein to express their own personal concepts, allowing their personality and attitudes to shine through. It is fine to help the child learn how to used coloring tools, but when you step aside and let them apply their own special touch to a coloring page, they'll discover a sense of who they are and it will jump start their appetite for knowledge.
Yes, it is a remarkable journey that our dear friend Pooh has managed to tread in his lifetime, but when you are traveling in the car for long distances it is perfectly understandable (albeit it extremely frustrating as well) that children get restless, agitated and then as a direct result of that, misbehave and react badly. Children have poor attention spans and extremely limited thresholds for boredom meaning that the parent should ensure that they take proactive steps to keep the little ones occupied. Whenever you are traveling long distances by car, it is little wonder that many of us want to keep the costs associated with the journey to an absolute bare minimum, after all given the significant amount of money that will have to be spent just to cover the cost of fuel how wouldn't want to keep the overheads as low as they can?