1. **Export the Models**: Begin by exporting the 3D models from Blender in a format compatible with 3D printing software. Common formats include STL (Standard Triangle Language) or OBJ (Object) files. Ensure that the models are properly scaled and oriented for printing.

2. **Prepare for Printing**: Import the exported files into 3D printing software such as Ultimaker Cura, Simplify3D, or PrusaSlicer. In the software, you'll configure settings such as layer height, infill density, and support structures. Since your models feature intricate details like people sitting on the rim, generating adequate support structures is crucial to ensure successful printing.

Choose a 3D Printing Service: If you haven't printed the models yourself, you'll need to find a 3D printing service. There are numerous online platforms where you can upload your model files and select the material, color, and printing options. These services often have a network of 3D printers available for use.

Upload and Customize: Once you've chosen a 3D printing service, you'll upload your model files and customize the printing parameters according to your preferences. This includes selecting the desired material (e.g., PLA, ABS, resin), choosing the printing quality (layer resolution), and specifying any additional requirements like hollowing out the models to reduce material usage.