diff --git a/README.md b/README.md
index 0321bd97a7f3862d6e0fc1b88c34642ec6eac101..35c488d367b64e9eecabb35651747fda2264dd48 100644
--- a/README.md
+++ b/README.md
@@ -70,3 +70,7 @@ Free Podcasts and Screencasts:
 + English: [github](/free-podcasts-screencasts-en.md)
 + Portuguese (Brazil): [github](/free-podcasts-screencasts-pt_BR.md)
 + Russian: [github](/free-podcasts-screencasts-ru.md)
+
+
+### Programming Playgrounds
++ [Free Programming Playgrounds](/free-programming-playgrounds.md)
diff --git a/free-programming-playgrounds.md b/free-programming-playgrounds.md
index cdd2a091707d85bbf4b0cb669c64a2ee93b64410..0b36f51581cc7847d2b7b2bb1fb91bda453b6404 100644
--- a/free-programming-playgrounds.md
+++ b/free-programming-playgrounds.md
@@ -2,6 +2,7 @@
 
 * [Angular](#angular)
 * [CSS](#css)
+* [FlexBox](#flexbox)
 * [JavaScript](#javascript)
 * [Node.js](#nodejs)
 * [PHP](#php)
@@ -15,6 +16,11 @@
 * [Plunker](http://plnkr.co)
 
 
+### FlexBox
+
+* [Echoplex](http://the-echoplex.net/flexyboxes/)
+
+
 ### CSS
 
 * [CodePen](http://codepen.io)