around 30-40 because 3 kids, 1 teen so ya i might me wrong but thts wat i think and if ur asking in real life i dont knw... :)
There Mom says Phineas is in Switzerland and Ferb is at Camp David.
Me
Caroline Rhea
Ferb is Phineas's stepbrother. Phineas's mom married Ferbs dad.
Ferb is from the Dad. Phineas and Candace are from the Mom.
No, Ferb is Phineas and Candace's step-brother. Ferb's dad married their mom.
Lawrences mom
Carolin Rhea
Ferb is Phineas' step brother and the Dad's real son. Phineas and Candace are the Mom's real kids and the Mom and Dad got married when all the kids were small. The dad's side of the family is from England and are in a couple of episodes and the mom's parents are in a couple too. The mom's parents are in the episode were they go camping.
ferb is eleven and Phineas is eight
Phineas and Candace took their mom's last name, and Ferb took his dad's last name.
I am pretty sure that Phineas' parents either got a divorce or his dad died and his mom remarried Ferb's dad. While Ferb's parents either got a divorce or his mom died and his dad remarried Phineas' mom. Phineas and Candace Flynn and Ferb Fletcher. Phineas and Candace also are not adopted by Mr. Fletcher. So as Ferb isn't adopted by Phineas and Candace's mom. *I am not 100% sure about this. It's just a hypothesis.