As you already know, Phineas and Ferb have an older sister, whose name is Candace. She is constantly trying to keep track of the brothers, to see what they are planning for themselves, but she never succeeds.
In this game you can arrange the tiles that you will be issued. Before you will be a picture in which you will see Phineas and Ferb - they read books, but my sister is spying on them.
The whole picture will be divided into more circles, and you will need to arrange all the tiles so that the picture becomes one whole again. so that you can start the game just now.