On which concerns to Encyclopedias, we selected "Kids Encyclopedia" After analysing this encyclopedia, we noticed it's not totally free as it requires a paid subscription to have access to further information, that is, it shows parts of each information or activity and it asks for a paid subscripion to have access to the rest of it.However, it gives a free 30-day-trial.
It only offers printable webquizzes, e.g. "The American Civil War". Otherwise, in order to do them online, we must have a paid subscripition.
We experienced some difficulty when exploring this website for it keeps continuously changing its main page.