I already wrote about auto-completion in the MySQL/MaiaDB command-line client using an auto-rehash feature. Recently I found out a new tool called mycli. It is a command line interface for MySQL, MariaDB, and Percona with auto-completion and syntax highlighting.
Personally, I consider programming as a fundamental right. The programming will teach children problem solving and reasoning skills. So, if you have gifted kid or nephew who is about to turn 10 or 11, gift him Python for kids book. The book introduces kids to the basic concepts of Python programming. The kids require no previous programming experience. However, must understand basic math concepts.