Website Project Description
Code Academy Bouncing balls Write your name with bouncing balls
Code.org An Hour of Code Lots of Fun Projects for New Programmers
Code.org Angry Birds Twenty coding puzzles based on Angry Birds
Made With Code Kaleidoscope Make a kaleidoscope animation out of different images
Made With Code Monster Dancing Make a monster that dances

Not challenging enough? Register (for free) at codeacademy.com (not codeacademy.org) and try the lessons on Python or JavaScript.