It's Linda's birthday! And the kids try to give her the best birthday ever.
Meanwhile Dr. Doofenshmirtz builds a machine that can shrink everything he hates.
- Birthday Episode
- Continuity Nod: Events from previous episodes are shown in Phineas' flashback
- Flashback: Phineas has one showing events of previous episodes with him saying that they can't forget their mom's birthday. Except the last one, where he asked what was he supposed to remember.