Multi-select problem: How does the next paragraph end?

How to make activity books for children
Choose a theme.
Although it can be general, most books have a theme based on holidays, seasons, or your child's preferences. This is an important step because it will make it easier for you to come up with content to fill the pages.

Available choices: I. Having a coherent message will also make it easier for you to educate your child. Holidays make good themes for activity books. II. Plan your book around the theme so that you have plenty of options to choose from. Some toys may help create themes or categories for the book. III. Maybe your children like animals, your theme might be classic christmas themes like christmas ball, hogwarts, or robin hood. Choose theme books at age 2 or 6 to enhance the look of the book. IV. For instance, you could say that young children love dinosaurs, puppies, swimming, and butterflies. Or you might have a theme based on tradition.
I.