Children demonstrating their understanding of fraction addition and the common mistakes they made when they kept forgetting the procedural step of taking LCM when in 5th grade they used to just add the numerators (the denominators were the same then).
A few of the many stories that were translated into scratch by the children:
A simple project with some basic work that most children are able to do
A week after being first introduced to a Makey, Makey and the children use it for water level detection (and a magic trick)
A video of children programming and learning from their attempts to make a finch robot drop a paper ball into a box.