Printed using ColorFabb Woodfill at 0.10 layer height, no infill, no support. Took 14 hours and half for all pieces together except 4 which I tried one by one before to find the best settings. So expect 16 hours for the full set at this layer height on an Original Prusa i3 MK2 with 0.4mm nozzle.
Also note that 2 pieces are missing some details in the label because the text is too small for this nozzle: Challenging and Silver Gen.
Great set for beginners, thank you very much!