About a 100 years ago and well into the 1950’s the first steps to learning about architecture could come in the form of these Dr. Richter’s “Anchor Blocks” or “building block sets“. These were usually made in Germany and often made out of stone or wood.
These sets were definitely Museum material that should be preserved. No we do not have a set for sale. Some checking on the internet could possibly procure you one, and I believe they have been re-made as well.