Continuity mistake: The crane that is behind the tree has a rope attached to it, but when Isabella comes the rope disappears.
Continuity mistake: Candace mentions that Jeremy works at Mr. Slushy Burger, but in later episodes is shown at Mr. Slushy Dawg. Afterwards, it was changed back to Mr. Slushy Burger.
Revealing mistake: The crane in the garden is behind the tree, but we see just the top of it - and under it is nothing.
Continuity mistake: When the "arms" take Perry's hands and feet. The "arms" came from the front of Perry, but in the next shot they've come from behind him.
Other mistake: The small door Candace enters at the beginning leads to the living room when really, it should be the kitchen. This error was not fixed in "Rollercoaster: The Musical."
Answer: And Bart Simpson should be about 40 by now. Cartoon characters don't age in real time. And are you really counting summer vacation days in a show about children who build spaceships and a platypus who's a secret agent?
Brian Katcher