Ben and Nathan spent nearly a year saving their money and finally I was able to take them to the Lego Store so they could buy the huge sets they had been saving for. Ben was saving for The Tower of Orthanc from The Lord of the Rings and Nathan saved for Arkham Asylum from Batman.
Ben won't let me help him anymore.
Arkham Asylum came with Batman, Robin, Joker, Harley Quinn, Posien Ivy, Scarecrow, Mr. Freeze, The Penguin and a Policeman along with a gate and a Police truck. Both boys got a police vehicle set for free as a promotional giveaway. The jail has four cels and a number of other rooms.
Ben'scame with a big Ent (not sure if its Treebeard or not), Wormtougue, Saruman (both with legs and robe piece) Gandolf and Eagle and two Orcs (one with a grappling hook to pull down the Ent.
As you see here its almost half as tall as Ben and has about 6 or so floors, plus the top where Gandolf was captured until the eagle saved him.
When we bought this the store clerk asked Ben how long he thought it would take him to build this and he told him about an hour. The clerk smiled and told him that when he got it it toke him about six hours to build it. It toke Ben about that broken up into two days.