Before you start this
level, you will to obtain the hammer ability. The easiest
way from here is to get it from Bonkers in the Yogurt Yard
Continue through the stage
until you reach a small platform with a door and
Broom Hatter above it. Enter the door.
Entering through the door,
you'll find a stump and two Sparkies. Get past the
Sparkies and slam down on the stump with your hammer to
open the passage to the door. Go through the door to make
way to the switch.