Lego Loco Unlockables and Easter Eggs (PC)

Lego Loco is a Lego-branded children's computer game for the Microsoft Windows platform. It is a simple open-ended construction game with a slight emphasis on Rail Transport. The aim of the game is to construct a town in which Lego people can live in. The game, similar to SimCity, lacks any real challenge, there being no construction costs, no running costs and no budget in general. That coupled with its very colourful graphics help to designate its target audience, which are children aged between 6 and 12.

At the beginning the player has available, a "Toy Box", in which he/she can select buildings from its lists and place them directly into the space provided. The player can put down roads, railway lines, stations, crossings, buildings and scenery. To start the simulation the player must close the Toy Box and the town will come to life (though the player can open it again to make some changes, or to save the town and/or open a new one). After a while Lego figures will begin moving into the houses provided (if any), and the player can, like with ordinary figures, pick them up and place them somewhere else. This can affect the figure's mood, depending on where it's placed. (Wikipedia)

Unlockables

Extra Pieces
During gameplay build the following.

Christmas Pieces - On December 25, you will get them. Alternatively, change the computer's date to December 25.

Desert Pieces - You'll get them on July 4. Alternatively change the date to July 4.

Giant Robot - Place a Large IG tower next to a Radar Station.

Halloween Pieces - On October 31, you will get them. Alternatively, change the computer's date to October 31.

Large Fountain - Place 4 fountains together in a square.

Mansion - Put two red brick houses together.

Space Shuttle - Launch Pad Place 2 Radar Stations together.

Easter Eggs

Ghost trains and all skeletons
On October 31 all trains will be turned to ghost-like trains and all the people will be skeletons too.

Nessy - The Loch Ness Monster

Place a lake anywhere on the map. Build yellow flowers (sunflowers) all the way around it.

The intro of a pretty interesting LEGO-based title: