This Petra Classic was always a big hit with my Sabbath School kids. It's a pretty song and easy to play for my young guitarists-in-training. I used to encourage kids in our Sabbath School classes to come on up and play with us. We created our own songbooks with simple chord progressives in two or three simple keys and taught them how to use a capo to change keys so they could keep up.
Here's Petra with "The Coloring Song":
One of my favorite song service choices.