You can read a great book titled All Aboard! by Mary Lyn Ray to your classroom. This book is easy for your children to understand and has colorful illustrations that are easy on the eyes. It will hold their attention and keep them listening to the words written so eloquently, all concerning the train.
If you desire, you can also read the book titled Chugga Chugga Choo Choo by Kevin Lewis. This book will animate your classroom as they repeat chugga-chugga-choo-choo along with the story while the train goes from town to town. The illustrations and text are great and this book is awesome for the project.
The last book is Train Song by Diane Siebert. This book has illustrations that are classic and sophisticated. The book description reads:
"Here is the song of the train. Listen as it rushes past big cities and small towns. Listen as it sweeps through forests and fields and into tunnels. Hear the whistle wailing, brakes squealing, wheels rolling, r-o-l-l-i-n-g, and stop. Now the train is homeward bound. All aboard!" 
All three books will ensure that your children know the basic concepts needed for this craft lesson with songs and sounds to boot. In your classroom, you will hear many "Who Whooooooooo's". Get ready for the children to have a look of excitement and amazement as they learn about the train.