The Hour of Code is a global movement promoted by code.org to encourage students of all ages to experience computer programming in a fun, self-paced environment One-hour tutorials are provided for different levels of learning in 45 languages.
Other Recommended Coding Activities
Kodable (K-2): Available on the web or as a free iPad app
Scratch: Allows students to create their own code and projects
CSFirst: A free computer science curriculum created by Google designed for 9-14 year olds