This is an interactive activity I use each year to teach kids how to work composite functions. With it students will work through an interactive and collaborate activity involving function notation, and only function notation. It is designed to 'trick' the students into actually completing a composite function without them knowing. (Just like how you have to trick kids into eating veggies :D ). After each student should have a good basic working understanding of composite functions (Of course extra practice will be needed daily to ensure mastery).