If you don't mind gimmicks I would highly recommend looking into Henry Harrius work with a cube. Essentially self working (to an extent) and can be examined after being solved.
RD Insta - Instantly solve a cube like real magic! No camera tricks even though it looks like one! Cube can immediately be handed out to examine after being solved.
Venom Cube - Spectator mixes a cube as much as they like, you then introduce a second cube and hold them side by side. All sides match. Technically speaking both cubes can be examined if you have good audience management skills. You can then instantly solve the cube using your favorite stack (Henry teaches a few easy ones to get you started.)
Cube3 - This one is by Steven Brundage and is not for beginners. Having said that, if you want to get into cube magic with an ungimmicked, borrowed cube, I highly recommend learning his material. It is incredible.