Associated Images:

Craven Butler (left), 6, and his brother Roman Butler watch a test flight during the Paper Airplane Challenge at the Tulsa Central Library downtown on Thursday. JOHN CLANTON/Tulsa World

Aidan Sanders (left), 6, and Alec Sanders, 5, watch an older child make a paper helicopter during the Paper Airplane Challenge. JOHN CLANTON/Tulsa World

Craven Butler, 6, tests a paper airplane he made during the Paper Airplane Challenge at the Tulsa Central Library downtown on Thursday. JOHN CLANTON/Tulsa World

Patrick Powell, 11, and his father, Billy Powell, celebrate a particularly long flight. JOHN CLANTON/Tulsa World

A volunteer hands out paper helicopters to children during the Paper Airplane Challenge on Thursday. JOHN CLANTON/Tulsa World
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