Tunnel Vision

Strut the Crane and Mika the Mechanic have constructed a large tunnel. Zack and Lily can't wait to try it. But when they do they realize it's very dark in the tunnel and they can't see. Mika has a light and she drives in to light it up, but Mika is too big to drive past when she's in the tunnel too. She can't leave the light either, since it has to be attached to her to work. But when Mika bumps into the side of the tunnel, some of the bark that makes the roof shifts and lets in sunlight. The Zerbies realize if they make little openings between the pieces of bark, they can use sunlight to light up the tunnel. Once this is done they play in the tunnel all day till it gets dark again. Once they realize the tunnel is dark because it's night they decide to go home for the day - ready to play in the tunnel again tomorrow.