Colombia Aprende- English

KIDSMART

Let's  see...
http://www.kidsmart.org.uk/

Games, e-cards, stories, coloring...! Let's  do it!
https://elt.oup.com/student/coolkids/coolkids1/?cc=global&selLanguage=en

British Council for teens

http://learnenglishteens.britishcouncil.org/