While playing the game, press [Ctrl] + [Shift] + C to display the console window. 
(CTRL+SHIFT+WindowsKey+C for Vista). Then, type one of the following codes and 
press [Enter] to activate the cheat function:

Code                                      Result
-------------------------------------------------------------------------------------
Kaching                                 - 1,000 more Simoleons.
Motherlode                              - 50,000 more Simoleons.
moveObjects [on or off]                 - Objects can be placed anywhere in buy and build
                                          modes; hand tool can move any object.
unlockOutfits [on or off]               - View career outfits and service uniforms.
                                          Note: Must be enabled before entering CAS.
resetSim [first name][last name]        - Return Sims to safe and nuetral state at home.
constrainFloorElevation [true or false] - Allows terrain adjustments.
disableSnappingToSlotsOnAlt [on or off] - Ojects will not snap to slots while holding [Alt].
fadeObjects [on or off]                 - Objects fade when camera gets close to them.
hideHeadlineEffects [on or off]         - Show talk/thought balloons above Sim's head.
jokePlease                              - Print random joke to console.
slowMotionViz [0-8]                     - Slow motion visuals; 0 is normal, 8 is slowest.
testingCheatsenabled [true or false]    - Test cheats.
fullscreen [on or off]                  - Full screen.
help                                    - Display most cheats.
familyFunds [x][y]                      - Give money to a family, where [x] is the family's 
                                          last name and [y] is the amount.
fullscreen [on/off]                     - Toggles windowed mode.
freerealestate                          - Ignore the cost when buying a lot.
enablellamas [on or off]                - Llamas enabled message.
babyboom                                - Adds baby and toddler to all households
resetlifetimehappiness                  - Reset lifetime happiness of all Sims in active 
                                          household.
displaylotpackagefilename [on or off]   - Toggle lot tooltips
Delete object                           - Delete any object
RestrictBuildBuyInBuildings [on or off] - Allows changes to lot otherwise restricted by 
                                          the Homeowner's Association.