Use a joystick motor rumble to stir small paint cans
Step 1: Tear Down
tear down, strip and gut your joystick, salvage all what you can (potentiometers, switches, etc) and get the, usually 2, rumble motors.
Step 2: Connection
Connect your motor to a battery, usually 5v (the one in the pic is a worn out 9v one)
Step 3: Attach
Attach the motor to the paint can and complete the connection to the battery or switch on
Step 4: Stir Baby!
Enjoy your paint stir, not shaken
Step 5: Pfred2´s Method
pfred2 method? (at least what i understood from the commentary)