The design of these shelves are inspired by the fireworks installation created by Cai Guo-Qiang. The gently curved ends of the shelf legs are reminiscent of a rope ladder, suspended from a hot air balloon. The result is both poetic and structural. Incidentally, Saga is famous for its hot air balloon festival.Cai Guo-Qiang. The gently curved ends of the shelf legs are reminiscent of a rope ladder, suspended from a hot air balloon. The result is both poetic and structural. Incidentally, Saga is famous for its hot air balloon festival.