Has there been any other toy like LEGOs that has an equal appeal among kids and adults? Here are some of the most expensive ...

The Joker, terrifying though he is, looks adorable as a LEGO Minifigure. LEGO Batman sets tend to cycle very quickly, from the time that they're launched to the time they're retired.

Although most of these little guys (and girls) tend to be worth only a few dollars, some of the most valuable Lego minifigures can sell for hundreds or even thousands.