Try using these terms in internet search engine:
Development milestones
teenage development milestones
tween milestones (this is age 8-12)
child development 6 years (or whatever age you want) it is all there if you look. Also text book and search "Child development Carolyn Meggitt" its a great book that you can use for child obs as well.
Hope that helps, I started in January and am finally getting the hang of it!
![Smile](images/smilies/smile.gif)