Explore Jango Fett's apartment, and you'll find some Legos to put together.
The Official Star Wars Lego web site provides a few images.
One review explains more about the scene in Jango Fett's apartment on Kamino.
Find some bricks scattered on the floor of Jango Fett's house, and you can rearrange them to form a portrait of the bounty hunter himself - then fiddle with them again to show a picture of a clone trooper. Nice touches like this alone make the game worth playing.
Still, it's virtually a must-play just for the fun of seeing little Lego characters miming out the best bits of the films. There's something about seeing Jango Fett run away on little stubby legs that Jedi Knight and KOTOR 2 just can't match.