We just need to help them 'get the proper picture' and our supportive comments and the behaviors we model for them, help guide them toward improved success with reading. Gentle guiding support is our role here, teachers. The horse went into the barn. It is sweet. It is round and steaming.
Child guesses choo choo train when reads the sentence.
More liekly, he is taking a guess while looking at the pictures. Then he will have another tool for unlocking unknown words encountered when reading. Some Excellent Reading Sources which will help clarify much of what you found here.