We all know the beanies very popular now, in fact before a long time the beanies also very popular in our life. Thus it can be seen it has a long history.
They were a popular informal boys' caps style in the early 20th century. The beanie was not as popular as the flat cap and was not worn for formal occassions, but it was popular for some time. It appears to have been an exclusively American style. It is a now little known cap in America where all boys wear baseball caps For a time (1940s to about the mid 1950s) some boys wore a felt or cloth cap that looked a bit like a crown - roundish top with a short, turned up brim cut into a series of peaks. There were some soecialized styles. Like many caps, this was an exclusively boys' styles.
Now there are many different types of boy caps, if you want to buy a boy cap, you can search it online. Believe you will find many imformations for boy caps, and you will find a boy caps that you like.