Chugga-chugga Chugga-chugga, Choo-choo

Chugga-chugga Chugga-chugga, Choo-choo!
The train runs down the track.
Chugga-chugga Chugga-chugga, Choo-choo
And then it runs right back.

Variation 1:

This little train ran up the track
It went "toot toot"
And then it came back. (run fingers up one arm, and then back down.)
The other train went up the track.
It went "toot, toot"
And then came back. (repeat with other arm)

Variation 2:
Here is an engine
That runs on this track (use left arm for track & right hand for engine)
It whistles –“Toot Toot” And then it runs back (run fingers back down)