The DIS Discussion Forums - DISboards.com - Using Proloquo2Go for crowd participation at WDW

Hi I am new here. My family is planning our 1st trip to Walt DisWorld in Jan. kids are 4,6 & 8. My 8 yr. old is mostly non-verbal with cerebral palsy. He uses a walker for getting around. He uses his iPad with a communication picture based app called ProLoquo2Go for communicating.
I would like to set up some screens prior to our visit so we won't need to do it all taking up time there.
I can set screens that open into other screens with multiple options. I am looking for what in various shows the audience participation parts might be, sort of like ( they say"When I say jump, you say, how high."etc.
Thanks for help.