Mrs. Turner's parents are revealed in this episode.
This episode shows that Timmy gets his looks from his maternal grandfather (referencing how he takes more after his mom's side of the family than his dad's side of the family), as Timmy bares a strong resemblance to Vlad.
Ustinkistan fairies can only grant wishes involving turnips.
Even though Ustinkistan fairies can only grant wishes involving turnips, Cosmo and Wanda are able to poof up normal pajamas when it turns to nighttime, suggesting that Ustinkistan fairies can poof up something like nightwear even if it doesn't involve turnips.
Another suitcase trivia piece is the word Fairy on it. It is currently unknown why.
Ustinkistan looks the same in the present and 50 years ago.
Timmy's grandparents are similar to Mama Cosma, Cosmo's mom, and Big Daddy, Wanda's dad, in that they don't like who their children married (Mama Cosma doesn't like Wanda, Big Daddy doesn't like Cosmo, and Mrs. Turner's parents don't like Mr. Turner).
Even though Big Daddy doesn't like that Cosmo's his son-in-law, he seems more willing to put up with him than Vlad and Gladys are willing to put up with their son-in-law and Mama Cosma's willing to put up with Wanda as her daughter-in-law.