I have a paper folded to make two flaps A and B.
If I rotate the flap A a little more, then It will just pass through the flap B.
I want to make the paper more realistic so that it pushes the flap B instead of passing through the flap B. If the pushing is too hard, I want at least to prevent the flap A to pass through the flap B.
I would appreciate very much if anyone direct me how to solve this issue. Thanks.