“The 'Hour of Code™' is a nationwide initiative by Computer Science Education Week[csedweek.org] and Code.org[code.org] to introduce millions of students to one hour of computer science and computer programming.”
First Graders have been introduced to Lightbot! A website (www.lightbot.com) and app used for coding.
Second and Third grade students have accounts with Tynker. (www.Tynker.com)
Fourth and Fifth grade coders have been using code.org.