3D Slash is a simple free program
Perfect for beginners. 3D Slash is not like a regular program, more like a friendly, interactive 3D world where you can create whatever you want.
Author: Bush Albert
Tinkercad review
Tinkercad is a web service for creating 3D-objects, which is used to create simple prototypes of decorative elements, jewelry, toys and various items for further printing.
How does 3D modeling work?
The developer uses special software to process points in virtual space (called vertices) to form a mesh: a collection of vertices that form an object.
Graphical models: An overview
Graphical models are intended to provide a concise description of possibly complex relationships between a set of variables.