Growth elixir

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Growth elixir
Type:	Chemistry
Episode(s):	"Attack of the 50 Foot Sister", "Phineas and Ferb Hawaiian Vacation"

The Growth elixir is a concoction made by Phineas and Ferb to make Baljeet's watermelon grow bigger for the Biggest Watermelon Contest at the Mid-Summer's Festival. While it was only meant to be used for the watermelon, Candace secretly used it to make herself taller, since she was two inches too short to apply to be the next Flawless Girl spokesmodel. The elixir only works on a person or object once, and takes a while to take full effect, initially resulting in only a small amount of growth. After taking full effect on the watermelon, Baljeet remarked that they would need a crane to move it; similarly, Candace eventually grew to a height of fifty feet.

Later on, Blanca Dishon and P. P. Otter fought over the elixir, but dropped it off the top of the Doofenshmirtz Evil Incorporated building and into the hands of Dr. Doofenshmirtz, who mistakenly disseminated it using his Smellinator. Initially intending to use the inator to cover the Mid-Summer's Festival in the smell of dirty diapers, Doofenshmirtz had set the range to "200 yards", however, after being released from his trap, Perry kicked him into the range selector, causing the elixir to spread throughout the entire universe. Because the elixir only works once, everything in the universe grew to match the size increase experienced by Candace and the watermelon, resulting in it appearing that they had shrunk back to their original size.

Unlike when it was used on the watermelon, the elixir took effect on different parts of Candace's body at different times. After the initial small growth spurt, the first part of her body to grow bigger was her nose, followed by her head becoming colossal (giving her a bobblehead-like appearance), and then the rest of her body growing to the size of her head.

Phineas later used the elixir again to make their Aqua Primates grow ("Attack of the 50 Foot Sister", "Phineas and Ferb Hawaiian Vacation"). Candace would mention it or its effects in two songs: "Mom Look" ("Rollercoaster: The Musical!") and "Such a Beautiful Day" ("Phineas and Ferb the Movie: Candace Against the Universe").