As always, the syllabus is fairly vague. There are three groups of causes of abdominal pain in children (as I see it). 1. More likely in children, 2. more likely in adults but could happen in children, 3. referred or non- abdominal.
Referred Scrotal Pain
Foreign body ingestion
More Likely in Adults
Inflammatory bowel disease (Crohns) with or without toxic megacolon
Abdominal migrainePneumonia pain
Sickle cell pain
There are many resources on assessing and managing abdominal pain. Take a good history, examine carefully, interpret observation trends, ensure early analgesia - and if in doubt...refer.