diff --git a/css.html.markdown b/css.html.markdown
index 811767e6..4c459f7f 100644
--- a/css.html.markdown
+++ b/css.html.markdown
@@ -119,6 +119,19 @@ selected:link {}
 /* or an input element which is focused */
 selected:focus {}
 
+/* any element that is the first child of its parent */
+selector:first-child {}
+
+/* any element that is the last child of its parent */
+selector:last-child {}
+
+/* Just like pseudo classes, pseudo elements allow you to style certain parts of a document  */
+
+/* matches a virtual first child of the selected element */
+selector::before {}
+
+/* matches a virtual last child of the selected element */
+selector::after {}
 
 /* ####################
    ## PROPERTIES