I use this activity when I teach rhythm vs. beat. I teach the song/chant Engine, Engine Number 9 first. Then I print out these pages. The track page is one per student (or pair) and one train page each. I laminate all the pages and cut out the trains and paperclip them to the track page. Then I ask the students to go through and tell me if there are one or two sounds in a beat (one piece of track) and put the double or single train on that track.