Squeak Etoys is a "media authoring tool"-- software that you can download to your computer
and then use to create your own media. You can write out your project and share it with others.
Etoys runs on any Mac or Windows machine, as well as on the OLPC XO machine.
It is free.
Find out about Etoys.
Text of this guide (for searching): Halo Handles: Move and Pick Up. Lift this fish with its black halo handle to remove it from the book and drop it in the world. Lift this fish with its brown halo handle and it can not be removed from the book. Use this fish's brown handle to move it higher on the page.