Almost no changes from season 3.   Honest.
 

• There's a new sponsor...'Sunny Delight'
• UH-OH Deluxe is now a 'taste test question' where one player must taste some sort of food and then decide which of 4 choices it tastes like
• Not exactly a show change, Sam has grown her hair out.  It's much longer than last season.
• Some of the Slime Tour games are not running obstacle courses.  This season has features a skating obstacle cource and one on BMX bikes.
• In some episodes, Mr Voiceman is a slightly different voice
• Sam, for unknown reasons, is absent from a few episodes leaving Aaron to work by himself