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): Paint Tools: A Palette of Colors. Click on a paint palette in your Navigator Bar.
Hover over the pink and black colors to open this rainbow of colors.
Click on a color to select it. Look for colors like these. Find gray.