I used this with my unit on Polar Express. It can also be used for train unit or just for fun. Each car of the train has a sentence on it. The students identify the parts of speech. They build their own gold to carry on their train car. I will modify based on your purpose for the lesson. I can do it with simple, compound, complex, kinds of sentences, certain part of speech. I have attached 20 train cars with simple sentences. They are able to identify nouns and verbs in these sentences.