tower-of-babel will show you through a series of exercises that introduce you to ES6 features. This exercises use babel. babel allows you to write code with ES6 syntax.
$ mkdir tower-of-babel-solutions && cd tower-of-babel-solutions
$ npm init -y
$ npm i tower-of-babel
$ npm i babel-cli babel-preset-es2015
$ echo '{ "presets": ["es2015"] }' > .babelrc
$ node ./node_modules/tower-of-babel/tower-of-babel.js