When Zamfeer first appears, he is playing a flute. Gheorghe Zamfir (same pronunciation) is the name of a musician known for playing a pan flute.
Olivia Holt (Brittany) admitted before shooting that she had a huge crush on Josh Peck (Liam), and took the role so that she could kiss him.
The water guns that Liam and Chloe use are designed to look like the classic Nerf Super Soaker 100 gun, except that their water tanks are transparent.