The six steps from the article, one tap at a time. The cat walks the opposite way from what the child intended. No adult points at the screen — four questions do the work. Notice that nothing in the picture lights up until the child has found the mismatch.
1
build one thing
2
run — it misses
3
what does it say?
4
what did you think?
5
where does it crack?
6
change one thing
The mismatch — the one place the two stories disagree