A Dashing Escape

Phineas built a portal gun so they can go everywhere: including The Mystery Shack, the mall, their car, the bedroom of Mabel and Dipper in The Mystery Shack, Candace's room, Phineas (his) and Ferb's bedroom and the backyard.

Chapter 1: The building of the portal gun
One day in the backyard, (*meh, I'm hiatus.*)