PH: Things That Go Together #2

Thanks to @user6937 for the idea for this swap.

Send 2 pairs of postcards (so a total of 4 cards) that go together.

For example:
Lighthouse and a boat
Bird and a tree
Lbrary and a book
Adult duck and a baby duck
Map and a car or plane
Etc.

Please send the 4 postcards in an envelope. Postcards should be unwritten and unstamped. They should be store bought only and of good quality. (No handmade/freebie/ad/zazzle). Let your partner know which pcs go together and why.