Tinkercad
Tinkercad is a collection of software tools from Autodesk, designed for complete beginners to create 3D models.
The software is based on constructive solid geometry (CSG), which allows users to create models by combining simpler objects.
Tinkercad is fully accessible through a web browser, thus requiring only an internet connection. The models are compatible with 3D printing, making it an excellent choice for those starting in this field. Its user-friendly interface is also very pleasant for teachers, children, and design enthusiasts.
Source: Tinkercad: The Online Software to Start 3D Modeling - 3Dnatives
Interface
The Tinkercad environment is very intuitive.
It's crucial to create an account. Without it, Tinkercad won't be fully accessible. After creating or logging in, however, we can start modeling and use models from others (provided these files are set to public). We can also share our created models with others.
When clicking on the "new" icon, three options will open up.
