Stigmata is good and can get everyone participating and very easy to do! But doing basics fo r school is good too, like ambitious card, colour changes worked into a mini routine very easy!
Yea i got reactions like that with stigmata too! Love it!
One time i did it to a guy, and really asked him to squeeze....my fingers closed he was squeezing so hard and i was spooked. Barly finished the trick right!