Here's a great Good Friday song for kids. If you're looking for something for children to sing about Good Friday, then you've come to the right place. This song is great for Sunday School, as it mentions three of the most important things about Jesus being crucified and dying on the cross*, and it's easy to sing, and memorable!
There's also a YouTube video, and it's available for immediate download from the Maynard's Groovy Bible Tunes website.
* the verses describe the darkness, Jesus cry, and the temple curtain