Click here to view this ShowMe demonstrating descriptive writing by a 3rd grader for a travel brochure.
ShowMe is a very simple, kid-friendly screencasting app. With the updated version, it now allows for multiple screens, and it has a text tool. I love its simplicity for very young students. The other attribute that distinguishes ShowMe from Educreations is that it can be replayed on any device from the web. With Educreations, you must have the app loaded on your iPad to replay. Since we will be using QR codes and parents' smartphones at Open House this year, I recommend ShowMe so that parents can scan the QR code and view their child's Screencast video on their phone. Read more about QR Codes and Open House.
If you'd like to know more about different free screencasting apps check out my screencast comparing these tools.
Here are some example screencasts from students: