Tim and Juanita put the finishing touches on the Hangout and introduce listeners to a new way to play.  They reveal the Hidden Sound, a new sonic twist on the classic Highlights’ Hidden Picture Game, and invite listeners to listen for, identify, and count up the Hidden Sound throughout the show.  They receive some HangMail for Arizona who answers one of life's big questions in the narrative-driven soundscaped story, Ask Arizona.  After a quick poem from a kid, Tim and Juanita head to an imaginary amusement park to take a ride in the wave pool.  The real fun comes while waiting in line as they play “I Can't Believe this Imaginary Wave Pool Has a Line This Long Game Show!!” where they learn some pretty amazing things about the sport of surfing.  After a quick joke transition, Goofus and Gallant come to visit the hangout with a special song about their adventures at camp.  Next up, a kid sends in a burning science question and Tim and Juanita know just the Guy...and Mindy who have the answer.  They throw to the MySci with Mindy and Guy segment where the hosts from popular science podcast Wow in the World answer this wow-worthy science question.  The episode wraps up with the answer to the Hidden Sound Game plus a riddle to solve by the next episode!