Yahooligans http://yahooligans.yahoo.com/
Kids Click! http://sunsite.berkeley.edu/KidsClick!/
Cyber Sleuth for Kids http://cybersleuth-kids.com/
Ask Jeeves for Kids http://www.ajkids.com/
AOL @ School http://www.aolatschool.com/elementary/search/browse.adp
ithaki for kids http://www.ithaki.net/kids/
Family Friendly Search http://familyfriendlysearch.com/