Never been open. For ages 9-14. The set 96121 Battle Action Castle is a Mega Bloks Legends King Arthur set released in 2008. The set consists of a huge Castle model with loads of moving parts, like the drawbridge. Also included are 5 minifigures, of King Arthur and 2 of his Knights, Sir Percival and Sir Belvedere, as well as 2 dark knights, Claudas and Malegant. This set contains 550 pieces. Micro motion King Arthur.