Code.org has developed several tutorials for students including Star Wars, Minecraft, and Frozen. Once your students have completed their hour of code, you can create certificates here.
Looking for coding resources across the grade levels? Look no further than Lisa Highfill's Hyperdoc that lists and provides links to different coding tutorials. Open it, make a copy, edit it to meet the needs of your grade level and push it out to your students to enjoy.
Hour of Code is just the beginning. Look for more blog posts this week highlighting different resources to either start your students coding or continue coding.