I cobbled together a toy train, a train track, and a train whistle. I made this for my child's birthday as party favor things. Choo Choo!
Here's a clip to hear what it sounds like: https://www.youtube.com/watch?v=sZ1VARuLIoo
Sorry for the potato I used to take pictures/record!
Note: I did not make the train track, the train, or the whistle! I'm just a cobblesmith.