Hello Liza! You could look at the Forums » The Guides » Virtual Villagers 3: The Secret City Guide » [SPOILERS] VV3 Puzzle Solutions & game tips by LadyCFII or Virtual Villagers 3 Tips, Tricks, Hints, Spoilers by Carla.
And many other thread that are helpfull! \:\)
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My Story: Aika's Memoirs in Kitten's forum