What is round on both ends and hi in the middle?

Why this works

This riddle plays with the visual and phonetic structure of the word "Ohio." The two 'o's at the beginning and end are circular shapes, representing the "round on both ends" part of the riddle. In the center, the letters 'h' and 'i' spell out "hi," cleverly hiding the wordplay in the middle of a simple state name! It's a fun example of how language can create playful puzzles through shapes and sounds.