Awwww.
I kept my viewmaster, which had been my brother's before me, and have dozens of reels from the 1940s and 1950s, and a few that I picked up in National Parks (USA) as an adult. They really are entertaining little things. There's a vintage shop near me that had the reels when I was in one day. I need to go back to see if they still have them and buy some more.