Go to the settings and turn on safe search. I find better results using Google than in using these sites which offer a "safe search". Google seems to have fewer ads than they do. You might want to a look at the digital resources which Google offers to families.
Kiddle is a Google search engine for kids. It seems to be free of pornography, but there are, of course, Google ads at the top of the results list. The results page has illustrations, and it is possible to search for images, videos, and news. There is also a kpedia which is a kiddle encyclopedia. Kiddle uses Google safe search but is not affliated with Google.
This search engine seems to be pornography free, but ads are on the top of the results page.
This is list from Common Sense Media. Make sure that you read the comments from people who have used the sites that are listed.
Ad Blockers
I am appalled by the number of ads which appear on web sites for children. I am posting some information on ad blockers here, and you are on your own in trying them out.
Many wireless networks provide means for parents to control their children's use. There is also quite a bit of information on how to teach children the safe use of wireless.
An extensive site with information for children, parents and teachers. The information provided deals with all forms of the
media. By the Canadian Centre for Digital and Media Literacy
There is information here about child safety
on the net, and there is also very important information about guarding your computer from viruses and hacker attacks. Try
taking the self test to find out how well prepared your computer is.