You use the Grappling Bowtie, which you get after rescuing the first and second spies. (see related question)
You jump
roof top
the second spy is on top of the roof in that little house thing and you go in with your camo suit.
just use the spy grappeling bowtie to get up there
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.
you go to the roof top and get passed the lasers first so you can get passed it.
stand on the top of the ship thing and he will brake ship thing by slamming on the roof
you get on top of the ye old romour mill sign, and jump on the wind mill blades and make the wind mill move. Jump about 4-5 times. Then, jump onto the middle of the windmill, and from that jump on the roof and enter.
You grab the antennae by going to the spy on top of the mansion and getting the bowtie that helps you grab hold of things such as hard to jump areas.
1/. On the hop advertisement island go to the top of the factory. 2/. 24 carrot island on top of the gas station sign. 3/. Hop island on a bush. 4/. Shark tooth island near the cocunut shack. 5/. Spy island go to the top of the spy building jump on the wire till the end of it jump up its there. 6/. Early poptropica on the meeting place. 7/. On the hop island somewhere [I forget where but it is there].
To get in the safe you have to jump up onto the flower and plant thing, onto the top of the safe, and down the shoot.
1.) jump up vent shaft 2.) jump on top off light fixtures 3.)drop down in front of door and leave