Bamum Script & Pictograms
Created by King Ibrahim Njoya from one of the kingdoms of western Cameroon, the system evolved from pictograms to semi-syllabary between 1896 and 1910. Not in use anymore, but the design is interesting - especially the over 400 pictograms created.
I like the question mark: ꛷
The arrow to the point suggests: "What's this?"
Our question mark likely comes from the Latin word quaestio - "question" that evolved into a sign for brevity during the Middle Ages. There are various stories of the origin.
Back to the Bamum scripts, very interesting icons - check this PDF with the Unicode characters.