categories in one page

can anyboday help me on some changes that i can put my category and its sub categories in one page?

For example, i have category structure as books–>children’s book–>1-4 years and 5-8 years (two different subcategories).

However, i would like to see the 1-4 years 5-8 years on the same page as children’s book. Very likely, the children’s book as table title, and the subcategories as the table content. As attached example file.

Thank a lot.