Sure, the working catapult is great, and the dragon that can be made to flap its wings is even better, but its the little things that really make this set come to life; like the gothic ornamentation on the heavy fortress doors, the weather-worn rocks, and the hollow stumps. The flexibility the pieces allow is also a big plus: the earth and architectural elements can be combined in almost any configuration imaginable. The knight figures are surprisingly ferocious looking, and are ingeniously designed to stand freely, snap in place on the ground, or mount horses and dragons. The weaponry and armour is simply fantastic, and a lot of it is removable. There is one flaw though;some of the pieces dont snap together as securely as they should, especially various dragon parts that are prone to fall off. Requires 2 AAA batteries (for dragon effects).