My mom recently went to an estate sale and picked up these neat things for me. These elementary school Science books from the 1950's are fantastic. If my science books had looked like this I think I would have enjoyed the subject a little more. Now all I need are a couple Erlenmeyer flasks and I'll have a really cute display!
This rotating disk from the 1930's shows Inventions on one side and Wonders of the World on the other side. You turn the dial to the item you want and it tells you who invented it and what year, etc.
A set of children's dictionaries from the 1960's in vibrant colors. My favorite part is the pictures inside like this one explaining Biology.