40 Winks

Playstation

Pause the game and enter the following codes:

Full cogs          Down, R2, L1, Up, R2 
More lives         L1, Up, Right, L2, Up
More moons         Up, L2, Left, R2, Left 
More Zzzs          Right, L1, Up, R1, L1 

Note: For the following codes, pause the game at the House Hub. 

All Dream Keys     Circle, L1, L2, L2, L2
All Winks          Left, Down, Right, Right, Right

Big Head:
Pause the game and hold the Select button, then press L1, Up, Right, L2, Up, and release the select button. Then hold the Select button and press L1, Up, Right, L2, Up.

Thanks to Revolution reader Jacob Payne and pete!