Quite a few.

I was 12 and grew up in an American suburb. I remember the contrast of how dull and drab a lot of places were compared to where I was living.

I found an East German pfennig on the ground at the airport, the material it was made out of seemed almost like it was plastic.

There was a stereotype at the time that the toilet paper in the USSR was going to be like sandpaper. What I remember is that the toilet paper in the public bathrooms was the same material as the paper towels in our public bathrooms. I had brought a couple of rolls of toilet paper from home, but they didn't last the whole trip.

Going through Checkpoint Charlie was legit scary. There were armed guards, with German Shepherds, searching the bus we were on. The guards walked up to each person and closely examined your passport and made sure it was you.

German girls were cute and they liked our American accent. I don't remember interacting with many (or any) Soviet girls. The Soviet boys we met would ask us for "chewing gum" or "chocolates". I had brought along a big bag of insividually-wrapped gum (Double Bubble maybe) and a big bag of Tootsie Rolls to give out.

In Moscow, Red Square and St. Basil's Cathedral were very impressive, Lenin's Tomb was very underwhelming.

It was July, and Leningrad is so far north that the sun didn't set at all. We were sitting up in our hotel room talking, thinking it must still be evening because the sun was still up, but it was 1 in the morning.

There were shops that only took foreign currency (no Rubles) which meant it wasn't for locals, only for visitors. They had Pepsi and a few other well-known American brands of things for purchase.

There were status of Lenin everywhere.

West Berlin smelled like diesel exhaust.

When I got back home it was around midnight. I told my parents I was hungry, and they asked where I wanted to eat. I said In-N-Out, so that's where we stopped.

My sleep schedule was backwards for about a week and a half.