If you've ask the oracle about the white building it's in Thomas Edison's house. If you go even further to the left (facing the screen) you will see a vehicle click on it and folow it or ride it. You can use this to climb the tree and get to the roof and you will be able to get the Sun Stone Piece.
It is on the top of the building (outside) Where Thomas Jefferson got the Declaration of Independence.
its on top of a building
At the top of the mountain in the building
It is in the HOP place on top of the Poptropica's Got Talent building.
on the building at the top
its on top of the NO TRESPASSING building
The first piece is in the Shark museum and the second is on top of the building next to the rope and the flying rocks. There should be a person next to the building talking about it. To get on it you should climb halfway up the room and then jump, you will land on the top and find the piece.
You go inside the open window on the top of the building
jump on the top one
On top of the house(watch out for snakes!)
Use the chameleon suit.
you go to the top of Edison's building :)