I don't teach computer science, but I do teach language to elementary school students. We have to use a lot of TPR = Total Physical Response (using movement and gestures - using the body to create muscle memory and the connection to emotional learning by having fun through kinesthetic activities) to help students learn. I think, I would teach sequencing and algorithms by pretending to give the students a very important assignment, make it fairly complicated, but on purpose leave out a pertinent step. This would frustrate them and they wouldn't be able to complete it. Of course, being young students, they will begin to whine and complain. Then I will tell them that obviously my algorithm and sequencing is flawed...that is exactly what happens to your computer when your algorithm isn't logical or perfectly sequential to your computer.