For a talent show you are gonna wanna keep it brief. A very short set, i would say about 3 effects would be right. Card tricks generally aren't going to play well (there are a few exceptions) Also, having a spectator come onto stage is going to take time. An opener should be something quick and to the point. Depending on the size of the venue you could do a couple different things. Productions always hit hard, the gold standard is the appearing bowling ball. Their a few different methods for this, the classic sketch pad is by far the best but Andrew Mayne has a good one that is low budget and anybody can do with household items. It's quick, cheap and looks great on stage. Second effect should be a little more involved, Fiber Optics is a great choice, its visual, fun and just about the right time (use the abbreviated routine) You could also look into something with a bit more humor but keep it strong and building to more. The finale is gonna be important. With a short show you need to leave them wowed. Since we have done a production first and a second effect that is about size changes, i would think an impossible location would work best. For this you have a couple options. Bill in Lemon, Angle Zero, Ring Flight the options are infinite. An alternative would be Tossed out Deck. It gets involvement from the audience, it builds to a big finale and it can be done pretty easily from stage. Again, these are all just ideas for what i think would 1) Work for a talent show 2) work for the time you have 3) Easy to learn and pick up in time (fiber optics being the excepting that takes work) 4)Can be done on the cheap 5) Routine well together (you do need to work out a script and practice) 6) Will translate well to a stage and be entertaining. Any questions feel free to ask, anyone disagrees i'd love to know why.