I'm not sure if this is the right section for this, then again it could fit in multiple places.

There are several effects on the market, and in print, where a freely named card is found inside a wallet/envelope, etc...each have their strengths, weaknesses and limitations.

I'm wanting to do something like this stage sized. A manila envelope is in view the whole time, and the freely named card is inside. Are any of the methods in print adaptable for this? Is there one made specifically for this?

I've come up with a few different methods myself, but I'm not too happy about the limitations I've imposed.

Thanks,

Josh