What did children do in the Middle Ages?
They used to play with dolls and doll houses, or board games (depending on class). They played on fields and helped their parents if poor. Hope that helps =) <3
To not plagiarizer, I recommend reading through this detailed article: http://historymedren.about.com/od/medievalchildren/a/child_toc.htm It covers from birth to teens and is very thorough. btw, late Middle Ages was the same as Early Middle Ages when it came to children. The times did not change very fast back then.
Well, The fact is that children during the middle ages were treated as miniature adults, this is most evident in the paintings of children from that time. They were not at all considered sweet and innocent as small children, if a child committed a crime or offended someone, they suffered the same punishment as their parents and other adults.