The skylight is on the Center/Museum building to the immediate right of the Cantina.
To enter Mayor Crumb's office
1) Get the multi-tool from the Clockwork Cantina
2) Pull the lever on the Cantina
3) Cross the extension arm to the Center
4) Use the steam exhausts to carry you to the roof, and over to the right side
5) Use the multi-tool to open the skylight bolts
There are no windows that open inward on Steamworks Island. There is a skylight in the City Hall that can be opened with the Multi-Tool. You go out the hatch above Zack's room in the living quarters, to reach the Mech Crank on the vines.
its in the museum on mainstreet of steamworks island :)
It's Steamworks Island #14th Island
(The solution is at the related question "How do you beat Steamworks Island")
the crab on steamworks island is next to the living quarters
You go to Steamworks and head to the museum and there is the Deogen
steamworks island
There is a video walkthrough at the related link below. There are written WikiAnswers solutions at the related questions, as there are for all Poptropica islands. (How do you beat Steamworks Island) (What is the walkthrough for Steamworks Island)
Steamworks island
how to do the bridge terminal on poptropica's steamworks island
you can get it on the far left of steamworks island, past the living headquarters.
jump