The phineas and ferb theory

Part 4

The true story of Phineas And Ferb actually does come from a real person who built imaginary worlds, a boy named Dan Povenmire.

As a child Dan Povenmire was an artistic prodigy that was obsessed with drawing cartoons. His mother recognized his creative abilities and always told him to "never waste a day of summer". He took this advice to heart and spent his summers inventing elaborate creations for the different stories he was imagining. He never lost his mind in his imaginary world like Candace in theory story though, because it came from positive experiences. So later on when he created Phineas and Ferb with a friend, they both agreed that the show would focus on the positive.

Phineas and Ferb make inventions for the pure fun of it or to bring happiness to others, and in this way find great adventures in each day of summer, despite their sister Candace's attempts to foil their plans.

And as for Candace well she's based on a real person too, Dan Povenmire's sister. As a kid she was always telling on him to try and get him in big trouble... sounds familiar doesn't it? :D