I took a part of the swing made in the following address; https://www.thingiverse.com/thing:1728577 and build a Duplo block with and axis to be used with other Duplo Parts. Print all of it in 1:1 scale in PLA with a 0.6 nozzle on an Ender 3 V1. No supports needed. Uploaded the Rhino File of the Block with the axis.