Kid-friendly piano music?

Hello!
I am a piano teacher, trying to come up with a simple arrangement of "Do You Want to Build a Snowman" for one of my students. I downloaded Musescore, and I thought I had it all figured out... but...

I was wondering if there was a way to make the appearance of the written music a little more kid-friendly. Ideally, I would like 3 measures by 4 lines (both staves). I figured out how to do the 3-measure break, but all it did was space it out, and there are still 7 lines to a page. Is there a way to make the music larger, to help with this?