Drew Powell, who plays Dash, said that he and the other two boys are like actual brothers. They fight sometimes, joke around and prank each other but they are very good friends now and hang out a lot.
All the math on the school chalkboard were real equations. The set decorators were very smart.
Swoosie Kurtz, who plays Tiffany, said the three boys who play Liam, Wyatt and Dash are "magic, they're just amazing and I just want to take them all home with me. They are adorable, and smart and so different each in their own way. "
The snowballs used for throwing were real. All the other snow in the boat scene is CGI.
The jungle set was not CGI - Everything from the see-through walls to the jungle plants were real. When the walls in the therapists office were lit from behind they were see-through otherwise they looked like regular walls.