Simple and easy to print twisting DNA model for kids.
Support should be only in touch of the building plate.
No Infill
Layer height - 0.2 mm
Wall thickness - 2 mm.

Designed to be print in place, tolerance of the model is 0.4 mm.

Test print was on BQ Hephestos 2
No additional assembly required, just twist it and gave to the kid.

In the assembley model there is 12 pcs (1 start, 10 middle, and 1 end piece). But there are separately models of start, middle and end piece, so you could print it separetely as mush as you want and assemble after was.