This was originally made with the BlockScad environment.
Each top needs a stick and a body. No support is needed, but you could add a skirt to the sticks.
I am an associate professor of educational technology at TECFA,, University of Geneva.
I do teach some digital design and fabrication to edtech students.
I do share some of my (limited) know how in http://edutechwiki.unige.ch/en and http://edutec...