A box kite is a type of kite consisting of a rectangular frame with a dihedral angle. Synonyms for box kite include biplane kite, double-cell kite, and diamond cell kite. Other variations of the box kite are the Hargrave box kite, cellular kite, and tetrahedral kite. These kites were first invented in the late 19th century and used for aerodynamic experiments and aerial photography. Today, box kites are often flown for recreation and can be found in various shapes and sizes. Regardless of the type of box kite, they all share the same basic design, which contributes to their stability and ability to fly in high winds.