Caffeine is baby adderall.

Seriously- small children with ADHD have LESS behaviour issues and better attention span after a sweet coffee than 'sober'.

Both are stimulants that get the ADHD brain to get its ass in gear and focus on something, in less than scientific terms.

https://www.webmd.com/add-adhd/adhd-caffeine

Not the source I remember reading byt has some info.