The Doplo "Big Trees" Expansion 

Build Big Trees to Decorate, or Expand Your Train / Logging Operation Play

This is the extension of my Doplo Logs model.  

Brief summary:  I designed log pieces to haul on a Doplo Train Car, the model was used by some to create trees, so I decided to take my model in that direction with a new Open SCAD based version.  

It's cross-compatible with my old logs and with the toddler-friendly Danish blocks.  The fit can be tight at first, so you will want to wear them down a bit before you let your littles play with them.  

Play ideas:
Put a big tree next to your dude's house.

Give trees for your favorite gal to cut down and then load the logs into the Danish Doplo train.

Allow your favorite child figurine to have their own tree house.
Other ideas – those are fine, too.

Print Settings

I used PLA.  I like the Sunlu Chocolate PLA for the natural brown color and the Kingsroon Green PLA for tree leaves, but you can use whichever colors you want.  I print with 4 walls and 15% infill, and I recommend supports for the perimeter anti-studs on any complicated models (like the tree stump).  If you are printing on an older model like a Prusa MK3S, you may want to add even more supports.  My print profile assumes you are using a Bambu printer which doesn't need support except what I mentioned before.  I have an A1 and MK3S that I use for all of my testing.  You can definitely change the print settings for your custom SCAD creations if you want – you do you.
 

OpenSCAD Disclaimer

These SCAD files are very open ended with very few guardrails.  This allows you to create very special, one-of-a-kind models, but depending on your settings, you can make weird, unusable abominations, so if you venture into SCAD land, you will need to play around with a few settings to get the perfect model.

A1 Disclaimer

I used Gemini Pro as a coding assistant to assist with the math and coding on this project.  Parametric modeling with organic shapes get math heavy, and Gemini is way better at math than me.  I provide the designs and extensive testing.  We make a great team.  These are SCAD-generated models, so they don't have any weird AI artifacts because  SCAD models are deterministic, predictable designs.