There is an "electrified" building on Toupee Terrace, where you have to jump from window to window when the power goes off.
The tall building on Balding Avenue has lasers that keep you from climbing it (and a pesky guard). Go farther left to the red building with the large tower on top. A friendly spy will suggest that you use the Grappling Bowtie to grapple back to the right, onto the other antenna. When you arrive, enter the greenhouse through the roof vent.
Use the laser pen to cut the bars in the window.
If you mean the laser pen you use it to cut open the bars at the top on the building that electrocutes you on spy island to get the second spy.
when you save the first spy at the docks he gives you a laser pen. When you get the laser pen you have to go the the brick building with the shock windows and climb to the top. When you get to the top there are bars covering a window so you have to click on it and the laser pen will show up. Then you hold down your mouse and drag the pen across the bars and you are in!
There is that building that shocks you, so you jump window to window until you get to the top and then you have to get you laser pen and laser the window thing and go inside.
If you are talking about the bars at the top of the tall building on spy island, then you need to find the laser pen. ( for poptropica )
He is in the building on Toupee Terrace that zaps you with its electrified windows. To rescue the second spy, jump up the windows while the power is off (it takes timing). At the top, use the Laser Pen from the first spy to cut open the bars.
Find a way to get to the top of the building
One of them is in the building in the dock he is on the roof inside the building. Another one is on top of the yellow laser building . the last one is on top of the bad. cafe and tons of other buildings.
save the girl on top of the building
It's on the top of the building with the shockers.
You get to the top, then stop!
jump on the windows when the lights are not on. if you touch a light you will be zapped and fall down. climb to the top of the building and cut the bars using your laser pen.