The Treasure Chest of Fun & Fact was a Catholic comic book published by George A. Pflaum of Dayton, Ohio and provided to Catholic parochial school students between 1946 and 1972. A good part of them are digitized online at that link....wanna guess who found em?
I'm amazed that they weren't preachy or didactic--even the lives of saints were interesting in a "Did you know?" kind of way. I'd completely forgotten about them, so flipping thru them now is....educational ☺...and fun. OMG.