Are there any non-castle sets that are depicted to be combined?
I have still only seen castles and sections of castles being combined to produce bigger castles - which is what I've done myself by buying more than one castle, or add-on DS parts, but that doesn't make the whole Playmobil system a construction system to my way of thinking.
So, for at least twenty years, it appears that Playmobil was presenting themselves as a company that produced building and construction sets!
Richard, you're still focussing on a tiny part of the Playmobil range, and then applying what you see to the entire range for the last 20 years.
Just because one style of building was created to be flexible and extendable doesn't make the whole Playmobil output a construction system.
There are thousands of sets which have NO buildings in them whatsoever. Are these construction sets? And no, putting a hat on a figure does not count as construction.
btw, my wife spotted a product today you might like - a box of tiny clay bricks, which you mortar together to create a building. The istructions included five diffent buildings you could make. When you're bored of the building, you dunk it in water, and the mortar dissolves releasing the bricks for re-use.
We didn't buy one because it was £30 and very heavy!