Skool, www.skool.com is a good site on safer browsing for kids. The site allows safer browsing on 8 different search platforms. A one-stop solution for safe browsing for kids.
Also, the site offers access to teaher tube educational videos. The kids can view the randomly generated videos.
Though the options offered are limited on the site but still a useful site. The kids could be directed to search internet via this site and maybe watch some educational videos as well.