I have 3 pages of "apps"
First page has a maybe 1-2 folders for stuff I don't normally use but cannot get rid of: Stocks.
Second page has a few more folders: Shopping (though Amazon sits outside this on its own), Photography (Snapseed is exception here, it too sits outside the folder), Entertainment, Education, Reading, and maybe 1 or 2 more folders but I keep the most used outside folders (and rarely use those in folders).
Third Page is all my son's Apps, and I have one folder there for books but everything else is out in the open so he can see it easily...though he mainly does the Elmo App, MoroTobi Book and one other.
It seems folders on my iPad and iPhone are for clustering Apps I don't normally use but might one day. or apps I cannot get rid of but hide away.