Virtual Villagers Tips & Tricks, Walkthroughs, Guides, Hints and HelpLast Day of Work Official Forums: Virtual Families, Virtual Villagers, Fish Tycoon
The huts are dependent upon population, not building tech. You could build all three new huts at L1 of Construction if you wanted to. You just wouldn't be able to do many of the puzzles.
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Barbara Unicorn Last Day of Work