The Incredible Machine Version 3.0 Cheats

Set your Windows clock to February 14th (Valentine's Day) and a Cupid part will appear at the bottom of the Parts bin. Set it to March 17th (St. Patrick's Day) and a Leprechaun part will appear at the bottom of the Parts Bin. Set it to October 31st (Halloween) and a Bat part will appear at the bottom of the Parts Bin.

Set your Windows clock to December 25 (Christmas Day). A new part, the Santa Claus Lamp, will be unlocked at the very bottom of the Parts Bin.