This lesson on penguins could be used for grades 1-4. This would be used as a brief introduction to penguins, with lessons following being more in depth and detailed. I think that this lesson does a good job of giving simple details and examples. The questions asked are mostly to make sure students are engaged, and comprehending the information being shared.
The art and craft of teaching with technology
Fun video and your questions guide the student to a better understanding of the content.