The Thames and Kosmos Fuel Cell Car and Experiment Kit, has been a hot item since its introduction five years ago. It has captivated tens of thousands of children and adults alike, who have played and learned with it. Now, in the sixth year from the launch of the original kit, we have created another version of the fuel cell car kit, the Fuel Cell X7. This kit still has our award-winning model car with its unique reversible fuel cell not found in other fuel cell car models. In this version, we have altered the kit to make it accessible to more users, both in terms of content and price. We have created a new manual focused more on building and designing a fuel cell car, rather than the comprehensive lesson on the science of fuel cells and solar cells found in the first version. We have lowered the minimum age and geared the instructions to a younger audience. The kit has been optimized for simplicity and ease of use over thorough experimentation. With its new focus, some parts have become unnecessary and thusly have been removed to reduce the cost. The kit that is right for you or your child will depend on your needs, interest level, and age group. The full-color, 16-page manual contains easy, step-by-step instructions for assembling and using the car, as well as scientific explanations. Ages 10 and up. Assemble a working fuel cell car. Discover how fuel cells work. Use a unique reversible fuel cell. Learn about the potential alternative energies for automobiles. Design your own fuel cell car.