(Un-)oriented manifold with (un-)oriented interfaces

Question

Are there examples that

1. An un-oriented manifold is glued from pieces of oriented manifolds [with boundaries], separated by interfaces [where boundaries are glued]? I suppose a Mobius strip is one example, but do we have any concrete 4-dimensional example [glued from 3-dimensional interfaces] and 3-dimensional manifold examples [glued from 2-dimensional interfaces]?

2. An un-oriented closed manifold is glued from pieces of oriented manifolds [with boundaries], separated by interfaces [where boundaries are glued]? Do we have any concrete 4-dimensional manifold examples [glued from 3-dimensional interfaces] and 3-dimensional manifold examples [glued from 2-dimensional interfaces]?

3. An oriented closed manifold is glued from pieces of un-oriented manifolds [with boundaries], separated by interfaces [where boundaries are glued]?

Please give examples. Are interfaces oriented or unoriented in these cases? Thanks a lot.