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AlltheWeb

AltaVista

Excite

Go!

Google

HotBot 

Lycos

Search Wizard @ IMSA

WebCrawler 

Search Tools for Kids

Kid's Tools

KidsClick! Web Search

Yahoo Kids!

Directories

LookSmart

Yahoo!

MultiSearch Engines

Ask.com

Dogpile

Mamma 

MetaCrawler 

Metasearch

Search.com