You will find the best information in the encyclopedias and databases that are referenced above on this page. But you may need to do your own internet searches to find information.
I know that you just want to use Google, but you should know that Google isn't meant for kids, and some of the articles are just too hard to read. Consider using Kiddle or Sweet Search, linked below, instead. These search engines are designed for students, and they will be much more user-friendly.