Cheat Mode
Dancing trees and flowers: Press Z + T during game play.
Listen to radio during credits
Press [Esc] during game play. Turn on the radio and click on the red brick when prompted to exit.
Flight mode
Enter the elevator at the Information Center. Allow one minute to elapse while in the elevator. Then, use the cursor keys to fly around the town.
Change moods and health
Click on the other characters when playing as Laura to change their moods. You can change other character's health when playing as Mama.
Go through walls
Walk up to any wall while playing as Pepper. Press [Keypad Plus] + [Keypad Minus] while walking into the wall. Note: This may require several attempts.
Fly
Press [Keypad Plus] + [Keypad Minus] while playing as Pepper. Pictures of LEGO characters will flash by. Continue this until a picture of Momma Brickoliney appears. Press [Keypad Plus] + [Keypad Minus] and you should see Momma Brickoliney again. Rapidly press Press [Keypad Plus] + [Keypad Minus] to move forward and up quickly. You can do this to go as high as desired. To go back down, walk over the island for awhile. Eventually, you will reappear back where you were when you first flew up. You can also walk through the walls and sides of the island while flying.
Hover
Go to the coast of the island, then press [Keypad Plus] + [Keypad Minus] while walking forward to the edge. Continue walking when you get to the edge while pressing those keys until you walk off the island and hover in the air. You can also walk through the sides of the island while hovering.
Grounded Helicopter
Get in the helicopter and fly over the race track. Click on your car to get in. Then click on your hands to fly the helicopter underground. To get back to normal, press the down arrow in the helicopter.