Later on, when we were a bit more technologically advanced, we had walkie-talkies which we hung on our bedposts at night. (If you took the wall away, we'd have been sleeping with our heads together.) If one of us wanted to chat, we'd quietly knock "shave-and-a-haircut" and wait for the other to knock "two-bits" if she was awake. Then the "caller" would knock three times slowly, and that was a signal to turn on the walkie-talkies.
We also used to have to read for half an hour or an hour (I forget which) before bed. We even had a game for that - I was a girl, and Haley was a crab, and we were on a boat (my bed) in the middle of the ocean (my blue rug). We'd read for a bit, and then the girl would start to fall off the boat and the crab had to grab her and pull her back on. We even had a theme song for it: "Reading Boat! Reading Boat! The wonderful thing about Reading Boat! Reading Boat! Reading Boat! The wonderful thing about this!" (Repeated many many MANY times.)
We played fun games, eh? I ought to write about some of the other games we played.