A scientific principle, proposed by the dragon, of course, and a little quick thinking, save tiny Ye Chan from the biggest bully in the school in Leaflet 4. Professionally written questions and a writing prompt are included for assessment. The leaflets are not sequential, so you can start anywhere, but Leaflet 1 explains how the whole adventure began.
Like everything else I have posted on TPT, it is "kid-tested" and kids love Ye Chan and the Painted Dragon!