It takes place in July and Jimmy says that his birthday is in three months, which means that his birthday must be sometime in October, but most sources claim that Jimmy's birthday is in March.
When Cindy And Libby Are Sitting Down Grass Is On The Porch.
The Ultra Deluxe Chemistry set is purported to contain "every element from Aluminum to Zirconium"; in reality however a children's chemistry set could not contain every single element as certain elements - such as Uranium or Plutonium - are illegal for civilians to possess, and certain elements - such as metallic Potassium - would also be very dangerous for a child to handle.
When Hugh says "Hiya, clown!", he walks through a table.
Judy's hair appears to be going through the couch when she was being hypnotized.