Getting started with Scratch 3.0 - User Interface
With Scratch, you can program your own interactive stories, games, and animations — and share your creations with others in the online community.
Scratch helps young people learn to think creatively, reason systematically, and work collaboratively — essential skills for life in the 21st century.
Scratch is designed, developed, and moderated by the Scratch Foundation, a nonprofit organization. It is provided free of charge.
This video discusses the user interface