Phineas and Ferb The Real Dad Being the son of a scientist explains why Phineas is so intelligent It also answers why they appear to have infinite funds, possibly because of a trust fund or similar that Phineas has access to.

Phineas also appears to have little to no care towards any side effect caused from their creations. The giant rollercoaster that goes through town would have caused multiple crashes. For example, they carved Candice's face into Mount Rushmore, they made a time machine and destroyed the timeline, they held a medieval jousting tournament, and they built an escalator to THE MOON. And that's just the first half of season 1. This is possibly a hereditary defect from Doofen dad

it is possible that Perry's mission is solely to prevent the meeting of father and son. If they were to meet, the two geniuses could wreak havoc together, especially because Phineas has a very moldable young mind.

The real reason why her mother can’t see the things that Phineas & Ferb build is that, well, they simply aren’t there.

And the more Candace tries to convince her mother, the more crazy she becomes

I hope u read it