In 2006 LEGO released 3 Belville sets. The largest Belville set from 2006 was
7577 Winter Wonder Palace with a piece count of 168 and a retail price of $69.99. The current estimated value of all these Belville sets from this year is about $710.93 which represents a 547% growth.
The Belville theme which was introduced in 1994 and later discontinued in 2009 was created to appeal primarily to girls. While the sets revolved around the concept of the LEGO system it featured doll-like figures known as Belville Figures instead of regular LEGO minifigures. The Belville Figures featured multiple joints to make play more like normal doll play and were larger than minifigures. The Belville theme was the predecessor to LEGO Friends.
2006 LEGO Sets
2006 for LEGO was a year of new themes being introduced and a number of well known themes being retired. LEGO in 2006 introduced and discontinued The Avatar: The Last Airbender, introduced the original Batman theme, Exo-Force, Mindstorms NXT, SpongeBob SquarePants, Remote control Trains and Aqua Raiders. However, the following themes were discontinued; Clikits, Vikings. While LEGO Sports was re-introduced in 2006 with a couple Soccer/Football sets.