Codemonkey: coffee script geared towards kids. 14 day free trial

Flex box froggy teaches flexbox bases with frogs on lily pad.

Flex box defense is similar

Code combat, for kids. Old rpg game look. Python JavaScript and codescript. Core levels are free.

Coding game is the author’s favorite. Completely free.

Checkio has j’s and python.

Codewars are for intermediate. Need to pass a simple test first.