Our third grade students complete their computer science unit with a free app called Hopscotch.  The students worked collaboratively with their group or partner to write a program so that their character could draw a square.  They were then asked to use a repeat block, or loop, to draw the same square using fewer pieces of code.  Finally, the students wrote an event to make that same character draw a square.  It took a lot of patience, debugging, and more patience!  Students are getting a real life feel for what is like to be a computer scientist!