Go inside Wumba's Wigwam where you will turn into a snowball. Then, go on a Warp Pad to the upper area of the fire side. Go left, then up a ramp a little farther ahead on the right. Next, go down the ramp on the ice side until you reach a building's roof. Go on a button that you can step on and watch a Jiggy go into Grunty Industries.